| 单词 | bichromate |
| 例句 | A salt containing two parts of chromic acid to one of the other ingredients; as, potassfum bichromate; Ð called also dichromate. Webster's Unabridged Dictionary (2nd 100 Pages) 2012-03-24T02:00:19.387Z In extensive outbreaks I have had the best results with the administration thrice daily of carbolic acid, nitro-muriatic acid, or bichromate of potassium, and hypodermically of iodide of potassium and sulphate of quinia. A System of Practical Medicine by American Authors, Vol. I Volume 1: Pathology and General Diseases 2012-03-17T02:00:54.097Z Hence, though the solution of potassium bichromate is an excellent depolariser as long as it contains any of the salt, it soon becomes exhausted. Electric Bells and All About Them A Practical Book for Practical Men 2012-03-06T03:00:25.273Z This was the discovery of Mr. Mungo Ponton, who first observed and announced the effects of the sun’s rays upon bichromate of potash. The Evolution of Photography With a Chronological Record of Discoveries, Inventions, etc., Contributions to Photographic Literature, and Personal Reminescences Extending over Forty Years 2012-02-15T03:00:30.577Z To sensitize the plates I employ a bath of bichromate of potash of six per cent, and again dry them. Scientific American, Vol. XLIII.?No. 1. [New Series.], July 3, 1880 A Weekly Journal Of Practical Information, Art, Science, Mechanics, Chemistry, And Manufactures 2012-01-05T03:00:30.823Z To combine or treat with a bichromate, esp. with bichromate of potassium; as, bichromatized gelatine. Webster's Unabridged Dictionary (2nd 100 Pages) 2012-03-24T02:00:19.387Z Oxidation of the hydrogen by potassium bichromate and by nitric acid. b. Hawkins Electrical Guide, Number One Questions, Answers, & Illustrations, A Progressive Course of Study for Engineers, Electricians, Students and Those Desiring to acquire a Working Knowledge of Electricity and its Applications 2011-12-24T03:07:54.823Z From this we learn that before the potassium bichromate enters into action in the battery, it is resolved into chromic acid. Electric Bells and All About Them A Practical Book for Practical Men 2012-03-06T03:00:25.273Z Other experimenters played variations on Mr. Ponton’s bichromate scale, and amongst the performers were M. E. Becquerel, of France, and our own distinguished countryman, Mr. Robert Hunt. The Evolution of Photography With a Chronological Record of Discoveries, Inventions, etc., Contributions to Photographic Literature, and Personal Reminescences Extending over Forty Years 2012-02-15T03:00:30.577Z To stain mahogany mix some bichromate of potash in hot water according to the depth of colour required. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 2 "French Literature" to "Frost, William" 2011-10-14T02:00:26.280Z On each of the four sides was a screw propeller 12 feet in diameter, driven by bichromate of potassium batteries and a dynamo-electric motor. The Great War in England in 1897 2011-09-20T02:00:17.083Z Fuller Bichromate Cell.—In the bichromate cells or the chromic acid cells, bichromate of soda, or bichromate of potassium, is used for the depolarizer, water and sulphuric acid being added for attacking the zinc. Hawkins Electrical Guide, Number One Questions, Answers, & Illustrations, A Progressive Course of Study for Engineers, Electricians, Students and Those Desiring to acquire a Working Knowledge of Electricity and its Applications 2011-12-24T03:07:54.823Z This pigment is made either from zinc salts and bichromate of potash or zinc oxide heated with chrome salts, frequently in the presence of acid. Paint Technology and Tests 2011-09-15T02:00:12.263Z It was an oleagenous process, mixed with bichromate of potash, or bitumen of Judea, and always smelt of bad fat. The Evolution of Photography With a Chronological Record of Discoveries, Inventions, etc., Contributions to Photographic Literature, and Personal Reminescences Extending over Forty Years 2012-02-15T03:00:30.577Z For quantitative determination compare the colour with that of standards in similar tubes prepared from the solutions of copper sulphate and potassium bichromate. Chlorination of Water 2011-09-13T02:00:32.243Z Ammonium bichromate is a self-combustible after the type of ammonium nitrate, but scarcely an explosive. Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 1 "Evangelical Church Conference" to "Fairbairn, Sir William" 2011-07-16T02:00:16.387Z The electrolyte may also be prepared as follows: take 4 ounces of bichromate of soda, 11⁄4 pints of boiling water, and 3 ounces of sulphuric acid. Hawkins Electrical Guide, Number One Questions, Answers, & Illustrations, A Progressive Course of Study for Engineers, Electricians, Students and Those Desiring to acquire a Working Knowledge of Electricity and its Applications 2011-12-24T03:07:54.823Z Chrome green is prepared as a paint pigment from nitrate of lead, Chinese blue, and bichromate of soda. Paint Technology and Tests 2011-09-15T02:00:12.263Z Tap water will do, but I would suggest distilled water for making the sensitizing solution of bichromate of potassium. Photogravure 2011-06-19T02:00:24.663Z On wool the mordant is bichromate of potash; on cotton and silk an iron mordant is employed. Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 8 "Dubner" to "Dyeing" 2010-12-26T03:00:17.840Z In addition to these normal salts, others exist, namely bichromates, trichromates, &c., which may be regarded as combinations of one molecular proportion of the normal salt with one or more molecular proportions of chromium trioxide. Encyclopaedia Britannica, 11th Edition, Volume 3, Slice 7 "Bible" to "Bisectrix" 2010-12-20T17:12:05.780Z The depolarizer is a bichromate solution which surrounds the perforated carbon plate located in the bottom of the jar. Hawkins Electrical Guide, Number One Questions, Answers, & Illustrations, A Progressive Course of Study for Engineers, Electricians, Students and Those Desiring to acquire a Working Knowledge of Electricity and its Applications 2011-12-24T03:07:54.823Z Two salts are in common use for this purpose, potassium permanganate and potassium bichromate. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 7 "Arundel, Thomas" to "Athens" Filter the acid solution into a 25 cubic centimeter graduated flask; bring to the mark with water and determine the glycerine by the bichromate method as described under glycerine analysis. Soap-Making Manual A Practical Handbook on the Raw Materials, Their Manipulation, Analysis and Control in the Modern Soap Plant. The 752 material is then passed through a solution of bichromate of potash. Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 8 "Dubner" to "Dyeing" 2010-12-26T03:00:17.840Z By the addition of mineral acids, they are converted rapidly into bichromates. Encyclopaedia Britannica, 11th Edition, Volume 3, Slice 7 "Bible" to "Bisectrix" 2010-12-20T17:12:05.780Z The cup is then filled with a very dilute solution of sulphuric acid or water and placed in a jar of glass or earthenware containing the bichromate solution and the carbon plate. Hawkins Electrical Guide, Number One Questions, Answers, & Illustrations, A Progressive Course of Study for Engineers, Electricians, Students and Those Desiring to acquire a Working Knowledge of Electricity and its Applications 2011-12-24T03:07:54.823Z A thin sheet of gelatine on paper is rendered sensitive to light by treatment with bichromate of potash, and then exposed under an ordinary photographic negative. The New Gresham Encyclopedia. Vol. 1 Part 3 Atrebates to Bedlis Calculate the value of the ferrous salt in terms of bichromate. Soap-Making Manual A Practical Handbook on the Raw Materials, Their Manipulation, Analysis and Control in the Modern Soap Plant. If necessary, the dyed colours may be treated with bichromate of potash. Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 8 "Dubner" to "Dyeing" 2010-12-26T03:00:17.840Z After the calcium sulphate has settled, the potassium chromate solution is converted into bichromate by the action of sulphuric acid, and the salt is allowed to crystallize. Encyclopaedia Britannica, 11th Edition, Volume 3, Slice 7 "Bible" to "Bisectrix" 2010-12-20T17:12:05.780Z A solution of bichromate of potassium is frequently substituted for the nitric acid in the porous cup, thereby avoiding disagreeable fumes. Hawkins Electrical Guide, Number One Questions, Answers, & Illustrations, A Progressive Course of Study for Engineers, Electricians, Students and Those Desiring to acquire a Working Knowledge of Electricity and its Applications 2011-12-24T03:07:54.823Z The first two operations should be performed in the dark room, but the remaining operations can be performed in daylight, once the plate has been placed in the bichromate bath. Wireless Transmission of Photographs Second Edition, Revised and Enlarged 1919 A correction for the non-volatile impurities may be made by running a bichromate test on the residue at 160° C. Soap-Making Manual A Practical Handbook on the Raw Materials, Their Manipulation, Analysis and Control in the Modern Soap Plant. The wool is boiled for 1 to 1� hours in a solution containing 2 to 3% bichromate of potash on the weight of the wool employed. Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 8 "Dubner" to "Dyeing" 2010-12-26T03:00:17.840Z Potassium bichromate finds application in photography, in calico-printing and in the preparation of bichromate cells. Encyclopaedia Britannica, 11th Edition, Volume 3, Slice 7 "Bible" to "Bisectrix" 2010-12-20T17:12:05.780Z It is prepared commercially from anthracene by stirring a sludge of anthracene and water in horizontal cylinders with a mixture of sodium bichromate and caustic soda. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 2 "Anjar" to "Apollo" Obtain some good fish-glue and add a saturated solution of bichromate of potash in the proportion of 4 parts of potash to 40 or 50 parts of glue. Wireless Transmission of Photographs Second Edition, Revised and Enlarged 1919 The glycerine may also be determined by the acetin or bichromate methods after driving off the alcohol and ether if so desired. Soap-Making Manual A Practical Handbook on the Raw Materials, Their Manipulation, Analysis and Control in the Modern Soap Plant. Not unfrequently certain so-called “assistants” are employed in small amount along with the bichromate of potash—e.g. sulphuric acid, cream of tartar, tartaric acid, lactic acid, &c. Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 8 "Dubner" to "Dyeing" 2010-12-26T03:00:17.840Z Sodium bichromate, Na2Cr2O7�2H2O, may be obtained by the addition of the requisite quantity of chromium trioxide to a solution of sodium chromate. Encyclopaedia Britannica, 11th Edition, Volume 3, Slice 7 "Bible" to "Bisectrix" 2010-12-20T17:12:05.780Z If the dirt cannot be removed in this way, the interior of the tube should be moistened with a little sulphuric acid in which some bichromate of potassium has been dissolved. The Methods of Glass Blowing and of Working Silica in the Oxy-Gas Flame For the use of chemical and physical students The bichromate should be dissolved in the water, and, when added to the glue, stir very thoroughly in order that complete mixing may take place. Wireless Transmission of Photographs Second Edition, Revised and Enlarged 1919 An approximation to the quantity can be obtained from the spread between the acetin and bichromate results on such distillates. Soap-Making Manual A Practical Handbook on the Raw Materials, Their Manipulation, Analysis and Control in the Modern Soap Plant. Wool is dyed in a similar manner, sodium sulphate being added to the dyebath, and the dyed colour treated with fluoride of chromium or bichromate of potash. Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 8 "Dubner" to "Dyeing" 2010-12-26T03:00:17.840Z They form rhombic crystals of a red or brown red or brown red colour and are readily decomposed by warm water, with formation of the bichromate. Encyclopaedia Britannica, 11th Edition, Volume 3, Slice 7 "Bible" to "Bisectrix" 2010-12-20T17:12:05.780Z In the porous cup was bichromate of potash and in the outer vessel dilute sulphuric acid. The Social Gangster Fourth, they are precipitated from their solutions by many metallic salts, such as lead acetate, stannous chloride, potassium bichromate, etc. The Chemistry of Plant Life From the amount of bichromate reduced calculate the percentage of glycerol. Soap-Making Manual A Practical Handbook on the Raw Materials, Their Manipulation, Analysis and Control in the Modern Soap Plant. They also serve as substitutes for fustic in wool or silk dyeing, and are dyed either on a chromium mordant, or first in an acid bath and afterwards saddened with bichromate of potash. Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 8 "Dubner" to "Dyeing" 2010-12-26T03:00:17.840Z Potassium chromate, K2CrO4, may be prepared by neutralizing a solution of potassium bichromate with potassium carbonate or with caustic potash. Encyclopaedia Britannica, 11th Edition, Volume 3, Slice 7 "Bible" to "Bisectrix" 2010-12-20T17:12:05.780Z In 1877, however, Nietzki worked out a very good process for the preparation of quinone from aniline by oxidation with sulphuric acid and bichromate of soda in the cold. Coal and What We Get from It This instrument has given a spark twenty-one inches in length, with three large cells of a bichromate battery. The Telephone An Account of the Phenomena of Electricity, Magnetism, and Sound, as Involved in Its Action If the analyst suspects that he is dealing with an impure potassium bichromate, the purity can be ascertained by titration against re-sublimed iodine. Soap-Making Manual A Practical Handbook on the Raw Materials, Their Manipulation, Analysis and Control in the Modern Soap Plant. The red or purple colours thus obtained are saddened in the same bath with bichromate of potash and changed into black, the colouring matter being oxidized and simultaneously combined with chromium. Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 8 "Dubner" to "Dyeing" 2010-12-26T03:00:17.840Z Bichromates.—The bichromates are usually of a red or reddish-brown colour, those of the alkali metals being readily soluble in water. Encyclopaedia Britannica, 11th Edition, Volume 3, Slice 7 "Bible" to "Bisectrix" 2010-12-20T17:12:05.780Z The burette is now filled with a solution of potassium bichromate and sulphuric acid and allowed to soak for some time; the bichromate is washed out and distilled water is put in. A Handbook of Laboratory Glass-Blowing Diamond is insoluble in acid and alkalis, but is oxidised on heating with potassium bichromate and sulphuric acid. Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 4 "Diameter" to "Dinarchus" N/10 Potassium Bichromate—Dissolve 4.903 g. of C. P. potassium bichromate in water and make the volume up to one liter at the temperature at which titrations are to be made. Soap-Making Manual A Practical Handbook on the Raw Materials, Their Manipulation, Analysis and Control in the Modern Soap Plant. It is made by adding to the common India ink of commerce about one per cent, in a very fine powder, of bichromate of potash. Paper and Printing Recipes A Handy Volume of Practical Recipes, Concerning the Every-Day Business of Stationers, Printers, Binders, and the Kindred Trades They are readily decomposed by heat, leaving a residue of the normal chromate and chromium sesquioxide, and liberating oxygen; ammonium bichromate, however, is completely decomposed 913 into chromium sesquioxide, water and nitrogen. Encyclopaedia Britannica, 11th Edition, Volume 3, Slice 7 "Bible" to "Bisectrix" 2010-12-20T17:12:05.780Z Prolonged soaking in a hot solution of potassium bichromate which has been acidified with sulphuric acid will often prove useful. A Handbook of Laboratory Glass-Blowing In one case, for example, decinormal solutions of potassium carbonate and potassium bichromate were used. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 8 "Conduction, Electric" The Committee calls attention to the fact that occasionally potassium bichromate is found containing sodium bichromate, although this is of rare occurrence. Soap-Making Manual A Practical Handbook on the Raw Materials, Their Manipulation, Analysis and Control in the Modern Soap Plant. The manganese dioxide may be replaced by various other substances, such as red lead, lead dioxide, potassium bichromate, and potassium permanganate. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 3 "Chitral" to "Cincinnati" Sulphur and phosphorus can sometimes be estimated by Messinger’s method, in which the oxidation is effected by potassium permanganate and caustic alkali, or by potassium bichromate and hydrochloric acid. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 "Châtelet" to "Chicago" A dilute solution of bichromate of potash is frequently employed to darken oak, mahogany, and coloured woods. Intarsia and Marquetry The colour of the latter is due to the presence of the bichromate group, Cr2O7. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 8 "Conduction, Electric" Standardization of the Sodium Thiosulfate Solution—Place 40 cc. of the potassium bichromate solution, to which has been added 10 cc. of the solution of potassium iodide, in a glass-stoppered flask. Soap-Making Manual A Practical Handbook on the Raw Materials, Their Manipulation, Analysis and Control in the Modern Soap Plant. It consists of an induction coil, put into action by a bichromate battery. Criminal Man According to the Classification of Cesare Lombroso In 1855 C. Brunner described a method for oxidizing the carbon to carbon dioxide, which could be estimated by the usual methods, by heating the substance with potassium bichromate and sulphuric acid. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 "Châtelet" to "Chicago" Powdered bichromate will dissolve more quickly than the lump. How Two Boys Made Their Own Electrical Apparatus Containing Complete Directions for Making All Kinds of Simple Apparatus for the Study of Elementary Electricity Corrosive sublimate or potassium bichromate are most frequently used for these purposes. Outlines of Dairy Bacteriology, 8th edition A Concise Manual for the Use of Students in Dairying On pure glycerines the results are identical with those obtained by the bichromate process. Soap-Making Manual A Practical Handbook on the Raw Materials, Their Manipulation, Analysis and Control in the Modern Soap Plant. Reduction of the bichromate to a green colour and a distillate, which smells of acetaldehyde and reacts with Schiff's reagent, shows the presence of alcohol in the original liquid. The Elements of Bacteriological Technique A Laboratory Guide for Medical, Dental, and Technical Students. Second Edition Rewritten and Enlarged. The dynamo machine used by them is an intensely concentrated bichromate battery of one and a half horse-power. Golden Days for Boys and Girls Volume VIII, No 25: May 21, 1887 When this gets about cold, add 4 ounces of bichromate of potash. How Two Boys Made Their Own Electrical Apparatus Containing Complete Directions for Making All Kinds of Simple Apparatus for the Study of Elementary Electricity The preparation of the solution is as follows—some pieces of bichromate of potash can be put into any ordinary bottle of a convenient size and water poured on to them. The Repairing & Restoration of Violins 'The Strad' Library, No. XII. When sugar is present the bichromate would be reduced by the sugar, hence this method is not applicable. Soap-Making Manual A Practical Handbook on the Raw Materials, Their Manipulation, Analysis and Control in the Modern Soap Plant. One very simple process is this: At any druggist's get an ounce of bichromate of potassium. The Ladies Book of Useful Information Compiled from many sources Accordingly — their viscera only being removed — they were tumbled into a large tub containing 2 lb. of bichromate of potassa to 20 galls. of spring water. Practical Taxidermy A manual of instruction to the amateur in collecting, preserving, and setting up natural history specimens of all kinds. To which is added a chapter upon the pictorial arrangement of museums. With additional instructions in modelling and artistic taxidermy. The zinc and fluid are rapidly destroyed in bichromate cells even when the circuit is open. How Two Boys Made Their Own Electrical Apparatus Containing Complete Directions for Making All Kinds of Simple Apparatus for the Study of Elementary Electricity Some of the manufacturers of new musical instruments on the continent lower the colour of the wood before varnishing by staining it with a solution of bichromate of potash. The Repairing & Restoration of Violins 'The Strad' Library, No. XII. By following the above instructions carefully it is possible to bleach one ton of palm oil with 17 pounds of bichromate of soda and 85 pounds hydrochloric acid. Soap-Making Manual A Practical Handbook on the Raw Materials, Their Manipulation, Analysis and Control in the Modern Soap Plant. Various leguminous trees, including lima, sapan and peach wood, dye red with alum and tartar, and a purplish slate colour with bichromate of potash. Vegetable Dyes Being a Book of Recipes and Other Information Useful to the Dyer In the case of the bichromate of potash it is most probable that an atom of oxygen is parted with, and so of many others. Photographic Reproduction Processes Apply this to the wood, and when dry treat with a solution of bichromate of potash in the same proportion as with the catechu. Mission Furniture How to Make It, Part 2 It must be kept in mind that bichromate of potash is a poison. The Repairing & Restoration of Violins 'The Strad' Library, No. XII. The methods generally employed are by the use of oxygen developed by bichromates and hydrochloric acid and the direct bleaching through the agency of the oxygen of the air. Soap-Making Manual A Practical Handbook on the Raw Materials, Their Manipulation, Analysis and Control in the Modern Soap Plant. They dye good but fugitive red with bichromate of potash, or alum. Vegetable Dyes Being a Book of Recipes and Other Information Useful to the Dyer I have experimented most extensively in many ways with the chromates and bichromates, and have succeeded in various ways in getting very good results. Photographic Reproduction Processes A piece of carbon paper is then coated lightly with gelatine, sensitized with bichromate of potassium and allowed to dry. The Building of a Book A Series of Practical Articles Written by Experts in the Various Departments of Book Making and Distributing Wash the metal and put it into a solution of bichromate of potash to which has been added a small amount of sulphuric acid. Practical Mechanics for Boys Besides these other materials are used in the refining of the oils and fats, and glycerine recovery, such as Fuller's earth, bichromates of soda or potash, sulphate of alumina, sulphuric and hydrochloric acids and alcohol. Soap-Making Manual A Practical Handbook on the Raw Materials, Their Manipulation, Analysis and Control in the Modern Soap Plant. Crude Palm Oil.—Of the various methods suggested for bleaching palm oil, the bichromate process originated by Watts is undoubtedly the best. The Handbook of Soap Manufacture A very capital process for many purposes is to float or steep your paper in a mixed solution of bichromate of potash and sulphate of copper. Photographic Reproduction Processes A perfectly even glass, copper, or zinc plate is covered on the surface with a solution of fine gelatine and bichromate of potassium, and dried. The Building of a Book A Series of Practical Articles Written by Experts in the Various Departments of Book Making and Distributing If wrought iron, put in the charge 20 parts, by weight, of common salt, 2 parts of potassium cyanide, .3 part of potassium bichromate, .15 part of broken glass. Practical Mechanics for Boys They contain carbon and zinc plates in a solution of bichromate of potash and sulphuric acid and water. Post Haste The ferrous ammonium sulphate solution is previously standardised by titration with a potassium bichromate solution of one-tenth the above strength, made by diluting 10 c.c. of the strong solution to 100 c.c. with water. The Handbook of Soap Manufacture In all the processes with metallic salts, alone with bichromates, the use of sized or unsized paper along with gelatine, etc., has some advantages. Photographic Reproduction Processes After sufficient exposure the plate is washed out in water to eliminate the bichromate not acted upon by the light, and is then actually ready for the press. The Building of a Book A Series of Practical Articles Written by Experts in the Various Departments of Book Making and Distributing To Kill Flies.—Dissolve one dram of bichromate of potash in two ounces of water, add a little sugar to this solution and put some of it in shallow dishes and place about the house. The Eugenic Marriage, Volume IV. (of IV.) A Personal Guide to the New Science of Better Living and Better Babies Benzo chrome brown G and 20 lb. salt, then treat in a fresh bath with 4 lb. bichromate of potash, 4 lb. copper sulphate and 1 lb. acetic acid. The Dyeing of Cotton Fabrics A Practical Handbook for the Dyer and Student For every ton of oil, 22 to 28 lb. potassium bichromate and 45 to 60 lb. acid will be found sufficient to produce a good bleached oil. The Handbook of Soap Manufacture The design is thus transformed into a negative, and can yield positive impressions with paper sensitized with silver salts, the ferriprussiate or the bichromate of potash. Photographic Reproduction Processes In bichromate batteries all that is necessary is to dip the zinc in the bichromate solution and then pour on a drop or two of mercury. Scientific American, Volume XLIII., No. 25, December 18, 1880 A Weekly Journal of Practical Information, Art, Science, Mechanics, Chemistry, and Manufactures. The orange-yellow precipitate formed by mixing a neutral salt of protoxide of thallium with bichromate of potash, is converted by nitric acid into an orange-red. Field's Chromatography or Treatise on Colours and Pigments as Used by Artists The fixing bath contains 2 lb. sulphate of copper, 2 lb. bichromate of potash, and 2 lb. acetic acid. The Dyeing of Cotton Fabrics A Practical Handbook for the Dyer and Student Hitherto, however, only two methods have been generally adopted, viz. the acetin and the bichromate processes. The Handbook of Soap Manufacture Ammonium bichromate 5 parts Ammonium chloride 5 parts Cupric sulphate 1 part Sulphuric acid 8 parts Water 150 parts Good well-sized paper should be employed. Photographic Reproduction Processes I have four cells of carbon battery; the solutions are bichromate of potash and sulphuric acid. Scientific American, Volume XLIII., No. 25, December 18, 1880 A Weekly Journal of Practical Information, Art, Science, Mechanics, Chemistry, and Manufactures. On chromate of cadmium, made with bichromate of potash, thallium would naturally confer an orange hue. Field's Chromatography or Treatise on Colours and Pigments as Used by Artists Glauber's salt, fixing with 4 lb. bichromate of potash and 2 lb. acetic acid. The Dyeing of Cotton Fabrics A Practical Handbook for the Dyer and Student To make waterproof glue, add one part of potassium bichromate to fifty parts of glue. Handwork in Wood Sensitizing.—The tissue is sensitized in a bath of potassium bichromate. Photographic Reproduction Processes Mordant with 3�lb. bichromate of potash, and 2�lb. tartar, for one and a half hours at the boil; rinse. The Dyeing of Woollen Fabrics In dyeing, for instance, the solutions of bichromate of potash and hyposulphite of soda would be worth a trial, the liquids of course being kept separate, and the brown washed with cold water. Field's Chromatography or Treatise on Colours and Pigments as Used by Artists Glauber's salt, fixing with 1 lb. bichromate of potash and ½ lb. acetic acid. The Dyeing of Cotton Fabrics A Practical Handbook for the Dyer and Student Certain substances like ammonia, potassium bichromate, and acetate of iron, give chemical reactions on certain woods and make very effective and inexpensive stains. Handwork in Wood However, the proofs can be kept for three weeks, may be more, before development, if the soluble bichromate be washed off, the tissue sponged and dried rapidly in the warm season. Photographic Reproduction Processes Work the goods in this at the boil for an hour, then lift, add 3/4�lb. bichromate of potash, and boil for twenty minutes longer. The Dyeing of Woollen Fabrics Various patterns could be printed with the bichromate on a ground previously treated with hyposulphite. Field's Chromatography or Treatise on Colours and Pigments as Used by Artists Dianil black N, 5 lb. soda and 20 lb. salt; then fix with 3 lb. copper sulphate, 3 lb. bichromate of potash and 2 lb. acetic acid. The Dyeing of Cotton Fabrics A Practical Handbook for the Dyer and Student Among their water stains some of the best are: Flemish oak, weathered oak, walnut, silver gray, forest green, and mahogany, especially if the latter is modified with bichromate of potash. Handwork in Wood Potassium bichromate and extract of indigo produce a fine greenish tone suitable for landscapes. Photographic Reproduction Processes Boil for an hour, then pass through a fresh bath of 2�lb. bichromate of potash for three-quarters of an hour at the boil; wash and dry. The Dyeing of Woollen Fabrics Potassium bichromate and sulphuric acid oxidize it to carbon dioxide and acetic acid, while alkaline potassium permanganate oxidizes it to carbon dioxide. Encyclopaedia Britannica, 11th Edition, Volume 4, Part 4 "Bulgaria" to "Calgary" Dianil black C R. 3 lb. caustic soda, 36° Tw. and 20 lb. salt, fixing with 3 lb. copper sulphate, 3 lb. bichromate of potash and 2 lb. acetic acid. The Dyeing of Cotton Fabrics A Practical Handbook for the Dyer and Student Make a saturate solution of bichromate of potash. Handwork in Wood Extract of indigo colors blue35 Some of these reactions can be applied to the printing processes with the bichromates, etc. Photographic Reproduction Processes If desired the goods may be subjected after dyeing to a treatment with alum or, better, bichromate of potash. The Dyeing of Woollen Fabrics It is composed of a vbunsen pile, which I do not work with bichromate of potash but with sodium. The Literary World Seventh Reader Work for one and a quarter hours at the boil, then allow to lie for a day, when the goods are passed into a bath containing 3 lb. bichromate of potash and 1 lb. alum. The Dyeing of Cotton Fabrics A Practical Handbook for the Dyer and Student A. Dissolve the bichromate of lime in the smallest possible quantity of warm water, and filter; then add the gelatin, previously softened by immersion in cold water. Scientific American, Volume XXXVI., No. 8, February 24, 1877 A Weekly Journal of Practical Information, Art, Science, Mechanics, Chemistry, and Manufactures. Dissolve the silver nitrate in 1 ounce of water, the citrate and bichromate in the remainder and mix. Photographic Reproduction Processes After dyeing the goods should be chromed with 3�lb. bichromate of potash and 2�oz. sulphuric acid. The Dyeing of Woollen Fabrics With bichromate of potash and sulphuric acid same as alcohol. Aids to Forensic Medicine and Toxicology Glauber's salt, then rinse and fix in a fresh boiling bath with 1 lb. bichromate of potash, 3 lb. sulphate of copper and 2 lb. acetic acid. The Dyeing of Cotton Fabrics A Practical Handbook for the Dyer and Student The bichromate of potash or of ammonia will answer nearly as well as the lime salt. Scientific American, Volume XXXVI., No. 8, February 24, 1877 A Weekly Journal of Practical Information, Art, Science, Mechanics, Chemistry, and Manufactures. The paper is floated in the dark for four or five minutes on a saturated solution of bichromate of potash. Photographic Reproduction Processes This greening becomes more marked when from 7-1/2 to 10�lb. of fustic is used, or if alum be added to the mordant along with the bichromate of potash. The Dyeing of Woollen Fabrics During distillation pass some of the vapour into concentrated solution of bichromate of potash, nitric and sulphuric acids, and note reaction as for alcohol. Aids to Forensic Medicine and Toxicology Glauber's salt; fix with 1 lb. bichromate of potash, 3 lb. sulphate of copper and 2 lb. acetic acid. The Dyeing of Cotton Fabrics A Practical Handbook for the Dyer and Student The student should next practise the titration with bichromate, which is more especially valuable in the estimation of hydrochloric acid solutions. A Text-book of Assaying: For the Use of Those Connected with Mines. When dry, it is printed a little longer than for silver prints and afterwards floated, face upwards, on a water bath until all the unaltered bichromate is dissolved. Photographic Reproduction Processes Add to the same bath 3�lb. bichromate of potash and 1�lb. sulphuric acid, and work half an hour longer. The Dyeing of Woollen Fabrics Two drachms of the bichromate caused death in four hours. Aids to Forensic Medicine and Toxicology Glauber's salt; fix with 1 lb. bichromate of potash, 3 lb. sulphate of copper and 2 lb. acetic acid. The Dyeing of Cotton Fabrics A Practical Handbook for the Dyer and Student Zinc should not be used as a reducing agent preliminary to a "bichromate" titration. A Text-book of Assaying: For the Use of Those Connected with Mines. The bichromate solution should be allowed to imbue the paper for about one minute, and having brushed it once more, the paper is pinned up to dry in the dark room. Photographic Reproduction Processes Slowly raise to the boil and work for one hour, then add to the same dye-bath 3�lb. bichromate of potash, and 1�lb. sulphuric acid, working at the boil for one hour. The Dyeing of Woollen Fabrics Sulphuric acid and bichromate of potassium give a green colour, oxide of chromium. Aids to Forensic Medicine and Toxicology After the dyeing the cotton is passed into a fixing bath of 2 lb. bichromate of potash and 1 lb. acetic acid, working at 180° F. ten to fifteen minutes. The Dyeing of Cotton Fabrics A Practical Handbook for the Dyer and Student The determination is rendered sharper and less liable to error by the addition of a few drops of acetic acid to convert the chromate into bichromate. A Text-book of Assaying: For the Use of Those Connected with Mines. This done, and when the unreduced bichromate is washed out in two changes of water, the operation is at an end. Photographic Reproduction Processes On this fact depends the process of mordanting wool with potassium bichromate, alum, alumina sulphate, ferrous sulphate, copper sulphate, etc. The Dyeing of Woollen Fabrics With dilute sulphuric acid and bichromate of potassium turns green, and evolves aldehyde. Aids to Forensic Medicine and Toxicology Vidal black, work at the boil for one hour, then rinse and fix with 3 lb bichromate of potash and 2 lb. sulphuric acid. The Dyeing of Cotton Fabrics A Practical Handbook for the Dyer and Student The method resembles in its working the bichromate iron assay. A Text-book of Assaying: For the Use of Those Connected with Mines. The paper is sensitized from the back with the potassium bichromate bath by floating or by brushing. Photographic Reproduction Processes With bichromate of potash, sulphuric acid is often used, much depending upon the character of the mordant required. The Dyeing of Woollen Fabrics The bichromate of potash is useful to darken oak, walnut, beech, or mahogany, but if applied to ash it renders it of a greenish cast. French Polishing and Enamelling A Practical Work of Instruction To get the yellow shade, afterwards chrome with 3 lb. bichromate of potash, 3 lb. sulphate of copper, 1 lb. acetic acid, in a fresh bath. The Dyeing of Cotton Fabrics A Practical Handbook for the Dyer and Student The iron, of course, must be in excess, which excess is determined when the ore is dissolved by titrating with standard permanganate or bichromate of potash solution. A Text-book of Assaying: For the Use of Those Connected with Mines. The pile is a bichromate of potash element, in which there is substituted for the liquid a solution of bichromate identical with that used in bottle piles. Scientific American Supplement, No. 312, December 24, 1881 Chromotrop 10�B and 4�lb. sulphuric acid; dye, and develop the black by adding to the same bath 3�lb. bichromate of potash and 1�lb. sulphuric acid. The Dyeing of Woollen Fabrics Another method is by dissolving a lump of bichromate of potash in warm water; the tint can be varied by adding more water. French Polishing and Enamelling A Practical Work of Instruction Work at the boil for one hour, then chrome in a fresh bath with 1 lb. bichromate of potash, 1 lb. sulphate of copper and ½ lb. sulphuric acid. The Dyeing of Cotton Fabrics A Practical Handbook for the Dyer and Student Chromate of baryta is then thrown down, by the addition of bichromate of potash, as a yellow precipitate. A Text-book of Assaying: For the Use of Those Connected with Mines. Add to it a little solution of bichromate of potash. St. Nicholas Magazine for Boys and Girls, Vol. 5, October 1878, No. 12 The goods after being dyed are rinsed and then passed into a bath at a temperature of 140��F., containing 3�lb. bichromate of potash and 1-1/2 to 2�oz. sulphuric acid. The Dyeing of Woollen Fabrics Very often in sending for bichromate of potash a mistake is made, and chromate of potash is procured instead; this is of a yellow colour, and will not answer the purpose. French Polishing and Enamelling A Practical Work of Instruction Glauber's salt; then fix in a fresh boiling bath with 2 lb. sulphate of copper, 2 lb. bichromate of potash and 2 lb. acetic acid, working for fifteen to twenty minutes, then rinsing and drying. The Dyeing of Cotton Fabrics A Practical Handbook for the Dyer and Student Cool and titrate the remaining ferrous iron with the permanganate or bichromate of potassium solution. A Text-book of Assaying: For the Use of Those Connected with Mines. Such trials should therefore be preceded by carefully conducted dyeing trials with bichromate of potash. Scientific American Supplement, No. 711, August 17, 1889 Glauber's salt, and 3�lb. acetic acid; after half an hour's boil, add 1-1/2�lb. bichromate of potash, work for half an hour longer. The Dyeing of Woollen Fabrics On numerous woods, carbonate of soda and bichromate of potash are very effective as darkeners, as are also other preparations of an 4acid or alkaline nature, but the two given above are the best. French Polishing and Enamelling A Practical Work of Instruction Benzo chrome brown R, and boiling bath with 4 lb. bichromate of potash, 4 lb. sulphate of copper and 1 lb. acetic acid. The Dyeing of Cotton Fabrics A Practical Handbook for the Dyer and Student In solutions rendered faintly acid with acetic acid, they give a yellow precipitate with bichromate of potash. A Text-book of Assaying: For the Use of Those Connected with Mines. The elements used may be bichromate of potash ones, those of Lelande and Chaperon, etc. Scientific American Supplement, No. 508, September 26, 1885 Work for one hour at the boil; then lift, add 2�lb. bichromate of potash and 3�lb. acetic acid, re-enter the goods and work for one hour longer; lift, wash and dry. The Dyeing of Woollen Fabrics A coat of the bichromate of potash solution referred to on page 4 will make wildly-figured mahogany have the appearance of rosewood. French Polishing and Enamelling A Practical Work of Instruction The fixing bath contains 2 lb. sulphate of copper, 2 lb. bichromate of potash and 2 lb. acetic acid. The Dyeing of Cotton Fabrics A Practical Handbook for the Dyer and Student The solution containing the chromate is added, and the remaining ferrous iron titrated with the permanganate or bichromate of potassium solution, as described under Iron. A Text-book of Assaying: For the Use of Those Connected with Mines. With a single already exhausted bichromate element, giving scarcely 2 volts, musical sounds and speech reached the receiver without being notably weakened. Scientific American Supplement, No. 508, September 26, 1885 Which of these are used depends entirely on the results which are to be got and the dye-stuff to be used, more particularly is this the case when bichromate of potash is the mordanting material. The Dyeing of Woollen Fabrics Showy elm-wood, after being delicately darkened with the bichromate solution No. 1, page 4, will pass for walnut; it is usually applied on the cheap loo-table pillars, which are made of elm-wood. French Polishing and Enamelling A Practical Work of Instruction Lift, rinse well, then pass into a chroming bath, made from 5 lb. bichromate of potash and 3 lb. sulphuric acid, used at 160° F. for twenty minutes, then lift, wash well and dry. The Dyeing of Cotton Fabrics A Practical Handbook for the Dyer and Student It is separated from baryta by dissolving in a little hydrochloric acid, adding ammonia in excess, and then acidifying with acetic acid, and precipitating the baryta with potassium bichromate, as described under Baryta. A Text-book of Assaying: For the Use of Those Connected with Mines. The battery used was a small Grenet bichromate of potash pile, which was easy to graduate on account of the depth to which the zinc could be immersed. Scientific American Supplement, No. 443, June 28, 1884 Work in this bath for one hour, then add 2-1/2�lb. bichromate of potash, and work again for half an hour, at the boil. The Dyeing of Woollen Fabrics The bichromate of potash is the most powerful, and is of a red colour. French Polishing and Enamelling A Practical Work of Instruction Prepare a fresh bath containing 2 lb. copperas; enter goods, give three turns, lift, and enter fresh bath at 120°, containing 2 lb. bichromate of potash, give four turns, drain, wash and dry. The Dyeing of Cotton Fabrics A Practical Handbook for the Dyer and Student This standard bichromate is made by dissolving 2.827 grams of the salt in water and diluting to 1 litre. A Text-book of Assaying: For the Use of Those Connected with Mines. Then, too, some other chemical, such as bichromate of potassium, or ammonium chloride, may be used instead of dilute sulphuric acid. General Science Another method is to mordant the goods at a boil for one and a half hours in 2�lb. bichromate of potash and 2�lb. tartar. The Dyeing of Woollen Fabrics It is obtained impure, as a by product, when for the preparation of valerianic acid, fusel-oil is distilled with bichromate of potash and sulphuric acid. The Art of Perfumery And Methods of Obtaining the Odors of Plants Glauber's salt; fix with 2 lb. sulphate of copper, 2 lb. bichromate of potash and 2 lb. acetic acid. The Dyeing of Cotton Fabrics A Practical Handbook for the Dyer and Student The bichromate method has the advantage of a standard solution which does not alter in strength, and the further one of being but little affected by altering conditions of assay. A Text-book of Assaying: For the Use of Those Connected with Mines. In the tumbler is placed a solution consisting of two-thirds of a tumblerful of water, two ounces of bichromate of potash, and two ounces of sulphuric acid. Scientific American Supplement, No. 794, March 21, 1891 The process is as follows: The wool is first mordanted by boiling for one and a half hours in a bath of 3�lb. bichromate of potash and 2-1/2�lb. of tartar. The Dyeing of Woollen Fabrics By oxidation with bichromate of potash and sulphuric acid, fusel oil yields valerianic acid, which is used in medicine, and apple-oil, employed as a flavoring ingredient in confectionery. The Art of Perfumery And Methods of Obtaining the Odors of Plants Glauber's salt and dye at the boil for one hour, then treat with 2 lb. sulphate of copper and 2 lb. bichromate of potash. The Dyeing of Cotton Fabrics A Practical Handbook for the Dyer and Student The bichromate is run in, in a steady stream, the assay solution being continuously stirred until the reaction is sensibly slackened. A Text-book of Assaying: For the Use of Those Connected with Mines. Should the solution lose its orange tint and turn blue, it indicates that more bichromate of potash or bichromate of sodium is needed. Cyclopedia of Telephony & Telegraphy Vol. 1 A General Reference Work on Telephony, etc. etc. Work at the boil for one hour, then lift; add to the same bath 3�lb. bichromate of potash and 1-1/2�lb. sulphuric acid. The Dyeing of Woollen Fabrics The ordinary method of manufacturing the bichromates consists in making an intimate mixture of finely pulverized chrome ore, lime in large excess, potash or soda, or corresponding salts of these two bases. Scientific American Supplement, No. 829, November 21, 1891 Glauber's salt, then treat in a fresh bath with 2 lb. sulphate of copper and 2 lb. bichromate of potash. The Dyeing of Cotton Fabrics A Practical Handbook for the Dyer and Student Solutions of ferrous sulphate and of ferrous chloride were made containing 0.5 gram of iron in each 100 c.c., thus corresponding to the standard solutions of permanganate and bichromate of potassium. A Text-book of Assaying: For the Use of Those Connected with Mines. The electrolyte of the Fuller cell is known as electropoion fluid, and consists of a mixture of sodium or potassium bichromate, sulphuric acid, and water. Cyclopedia of Telephony & Telegraphy Vol. 1 A General Reference Work on Telephony, etc. etc. Glauber's salt, and 2�lb. sulphuric acid, and fix in the same bath with 1�lb. bichromate of potash. The Dyeing of Woollen Fabrics After the oxidation is finished, the mass is taken from the furnace and cooled; the bichromate is obtained by lixiviation, treated with sulphuric acid and crystallized. Scientific American Supplement, No. 829, November 21, 1891 Glauber's salt; dye at the boil for one hour, rinse and then treat the goods simmering for twenty minutes with 4 lb. bichromate of potash. The Dyeing of Cotton Fabrics A Practical Handbook for the Dyer and Student When calcination is not admissible it may be destroyed by heating with strong sulphuric acid and bichromate or permanganate of potash or by fusion with nitre. A Text-book of Assaying: For the Use of Those Connected with Mines. Such substances are bichromate of potash, nitric acid, and chlorine, and are largely used. Cyclopedia of Telephony & Telegraphy Vol. 1 A General Reference Work on Telephony, etc. etc. Now the woolen dyer has largely adopted an excellent mordant in bichromate of potash; it is cheap, easily applied, and not perceptibly injurious to the fiber. Scientific American Supplement, No. 810, July 11, 1891 The mass after lixiviation, being treated with a solution of sulphate or carbonate of potash or soda, will yield chromate of potash or soda, and by the employment of sulphuric acid, the corresponding bichromates. Scientific American Supplement, No. 829, November 21, 1891 Glauber's salt; fix in a fresh boiling bath with 3 lb. sulphate of copper, 1 lb. bichromate of potash and 10 lb. The Dyeing of Cotton Fabrics A Practical Handbook for the Dyer and Student It is used as an oxidising agent in a similar manner as permanganate and bichromate of potash, especially in the determinations of copper, arsenic, antimony, and manganese. A Text-book of Assaying: For the Use of Those Connected with Mines. The electrolyte for this cell is made as follows: Sodium bichromate 6 oz. Cyclopedia of Telephony & Telegraphy Vol. 1 A General Reference Work on Telephony, etc. etc. As a source of electricity, use is made of a bichromate of potash battery of 6 elements, capable of giving 10 volts and 15 amperes. Scientific American Supplement, No. 483, April 4, 1885 If, instead of chromate or bichromate of potash or soda, chromic acid is sought, the mass after lixiviation is treated with sulphuric acid, and the chromic acid is obtained directly without any intermediate steps. Scientific American Supplement, No. 829, November 21, 1891 By after treatment in a bath of 3 lb. potassium bichromate and 3 lb. sulphuric acid the colour is made fast to washing. The Dyeing of Cotton Fabrics A Practical Handbook for the Dyer and Student Besides nitric acid, permanganate of potash, bichromate of potash, and peroxide of hydrogen are largely used for this purpose. A Text-book of Assaying: For the Use of Those Connected with Mines. Potassium bichromate may be substituted for the sodium bichromate. Cyclopedia of Telephony & Telegraphy Vol. 1 A General Reference Work on Telephony, etc. etc. Black Prints.—Wash the paper with a saturated solution of bichromate of potash, made quite acid with acetic acid. Scientific American Supplement, No. 483, April 4, 1885 To the solution one and a half per cent. of bichromate of potash is added, which has previously been dissolved in a little water. Burroughs' Encyclopaedia of Astounding Facts and Useful Information, 1889 Havana Brown.—Prepare a bath with 4 lb. cutch and 1 lb. bluestone; work at the boil for one hour, then pass through a warm bath of ½ lb. bichromate of potash, 1 lb. sulphuric acid. The Dyeing of Cotton Fabrics A Practical Handbook for the Dyer and Student Dilute with water, and titrate the residual iron with standard solution of bichromate of potassium. A Text-book of Assaying: For the Use of Those Connected with Mines. This solution is mixed by dissolving the bichromate of sodium in the water and then adding slowly the sulphuric acid. Cyclopedia of Telephony & Telegraphy Vol. 1 A General Reference Work on Telephony, etc. etc. It was the shade of purple called mauve, and the chief agent in its production was bichromate of potash. Scientific American Supplement, No. 470, January 3, 1885 To stain the new pieces, get half an ounce of bichromate of potash, and pour a pint of boiling water over it; when cold bottle it. Burroughs' Encyclopaedia of Astounding Facts and Useful Information, 1889 Prepare another bath with 3 lb. bichromate of potash; enter cotton at 160° F., work fifteen minutes, lift and wash. The Dyeing of Cotton Fabrics A Practical Handbook for the Dyer and Student In about an hour the decomposition is complete, and the solution is diluted with cold water, and titrated with the solution of bichromate or of permanganate of potassium. A Text-book of Assaying: For the Use of Those Connected with Mines. The electric current is furnished by two series of bichromate batteries. Scientific American Supplement, No. 787, January 31, 1891 Yet, despite the qualities inherent to the arrangement that we have just described, that defect common to all bichromate of potash piles—the deposit of oxide of chromium upon the carbon—is not here avoided. Scientific American Supplement, No. 455, September 20, 1884 From four to six cells of a bichromate battery or Faure secondary battery furnish sufficient power to run the machine at a high speed. Scientific American Supplement, No. 520, December 19, 1885 The most usual oxidising agent employed for dyeing aniline black is bichromate of soda, which salt will be found much better for all purposes than bichromate of potash. The Dyeing of Cotton Fabrics A Practical Handbook for the Dyer and Student PROCEDURE.—Pulverize about 5 grams of potassium bichromate of good quality. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes It is produced from the sulphate of aniline by mixing it with a cold saturated solution of bichromate of potash, and allowing the mixture to stand for ten or twelve hours. The Story of a Piece of Coal What It Is, Whence It Comes, and Whither It Goes Among these, Mr. Grenet was one of the first to present the bichromate of potash pile under a truly practical form. Scientific American Supplement, No. 455, September 20, 1884 Add as much bichromate of potash as the solution will dissolve. The Boy Mechanic: Volume 1 700 Things for Boys to Do Another aniline black: For 100 lb. cotton use 11 lb. aniline oil, 15 lb. bichromate of soda, 40 lb. hydrochloric acid and 160 gallons water or 12 lb. sulphuric acid. The Dyeing of Cotton Fabrics A Practical Handbook for the Dyer and Student Since both solutions are approximately tenth-normal, 35 cc. of the bichromate solution may be added without testing. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes It was found that, by adding bichromate of potash to a solution of aniline and sulphuric acid, a powder was obtained from which the dye was afterwards extracted, which is known as mauve. The Story of a Piece of Coal What It Is, Whence It Comes, and Whither It Goes Wash the inner surface of the bladder with salt and water, and after cutting it longitudinally and transversely, put the sections in a solution of three drachms bichromate of potash in a quart of water. Scientific American Supplement, No. 492, June 6, 1885 More bichromate of potash should be added as the precipitate is used in cleaning. The Boy Mechanic: Volume 1 700 Things for Boys to Do The colour is then developed by treatment with bichromate of potash, either with or without the addition of an iron salt to darken the shade of brown. The Dyeing of Cotton Fabrics A Practical Handbook for the Dyer and Student If a blue precipitate appears at once, 0.5 cc. of the bichromate solution may be added before testing again. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes Some of the disks were submitted to the action of an oxidizing solution consisting of a cold saturated solution of potassium bichromate with 5 per cent. by volume of pure concentrated sulphuric acid. Scientific American Supplement, No. 415, December 15, 1883 My color-screen consists of a small plate-glass tank, having a space of 3/16 of of an inch between the glass, filled with a solution of bichromate of potash about one grain strong. Scientific American Supplement, No. 492, June 6, 1885 Proceed as follows: In 32 oz. of water dissolve 4 oz. potassium bichromate. The Boy Mechanic: Volume 1 700 Things for Boys to Do Next steam, then run through a solution containing 10 lb. bichromate and 5 lb. soda per 100 gallons water at 160° F., after which the goods are washed and dry steamed at 15 lb. pressure. The Dyeing of Cotton Fabrics A Practical Handbook for the Dyer and Student It is also evident that any excess of the agent used to reduce the iron must be removed; otherwise it will react with the bichromate added later. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes The car was made of bamboo rods, and in addition to its crew of three, it carried a Siemens dynamo, with 24 bichromate cells, each of which weighed 17 lbs. A History of Aeronautics The kind of battery employed has a marked effect upon the sensitiveness to light, which is largely reduced or entirely destroyed when the bichromate battery is used. Scientific American Supplement, No. 492, June 6, 1885 When the bichromate has all dissolved, add slowly, stirring constantly, 4 oz. sulphuric acid. The Boy Mechanic: Volume 1 700 Things for Boys to Do It may be separated by shaking out with dilute sulphuric acid, and then precipitating the sulphuric acid solution with potassium bichromate, the resulting acridine bichromate being decomposed by ammonia. The Project Gutenberg Encyclopedia Volume 1 of 28 The latter object is accomplished by oxidation to stannic chloride by means of mercuric chloride added in excess, as the mercuric salts have no effect upon ferrous iron or the bichromate. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes M. Ponton used a paper saturated with bichromate of potash, and this was one of the earliest photogenic processes. History and Practice of the Art of Photography It is composed of a Bunsen pile, which I do not work with bichromate of potash, but with sodium. Twenty Thousand Leagues under the Sea No. 32 wire, and used on one cell of bichromate of potash plunge battery. The Boy Mechanic: Volume 1 700 Things for Boys to Do In order to do away with this inconvenience, which is inherent to all bichromate piles, Mr. G. Mareschal has invented and had constructed an ingenious system that we shall now describe. Scientific American Supplement, No. 447, July 26, 1884 It frequently occurs in or near peat beds and contains more or less organic matter which, if brought into solution, would be acted upon by the potassium bichromate. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes I was able to prepare several globules of metallic silver, as also all the well known chemical combinations, such as sulphide, chloride, oxide, iodide, bromide, bichromate of silver, etc. Scientific American Supplement, No. 385, May 19, 1883 When hydrochloric acid is added to bichromate of potash, chromic acid is liberated. Scientific American Supplement, No. 384, May 12, 1883 Here it remains at discretion for half an hour, or an hour; the purpose, of course, being to wash out the soluble bichromate. Scientific American Supplement, No. 362, December 9, 1882 This battery was first employed for the purpose of utilizing waste solution from bichromate batteries, a great quantity of which is thrown away before having been completely exhausted. Scientific American Supplement, No. 363, December 16, 1882 The important oxidizing agents employed in volumetric solutions are potassium bichromate, potassium permangenate, potassium ferricyanide, iodine, ferric chloride, and sodium hypochlorite. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes Thus the positive process of carbon printing would be modified in such a manner that the mixtures containing the permanent pigment should be sensitized with silver bromide in place of potassium bichromate. Scientific American Supplement, No. 286, June 25, 1881 According to Benz the first two do not remove the sulphuretted hydrogen completely, and oxidise the acetylene to some extent; while potassium bichromate leaves some sulphur and phosphorus behind in the gas. Acetylene, the Principles of Its Generation and Use A Practical Handbook on the Production, Purification, and Subsequent Treatment of Acetylene for the Development of Light, Heat, and Power Put it to soak in a solution of one dram of bichromate of potash in a pint of water. A Practical Physiology It will therefore be seen that not only the solution, but also the zinc and mercury remnants of bichromate batteries are utilized, and at the same time a considerable quantity of electricity is generated. Scientific American Supplement, No. 363, December 16, 1882 The most important combinations among the foregoing are: Potassium bichromate and ferrous salts; potassium permanganate and ferrous salts; potassium permanganate and oxalic acid, or its derivatives; iodine and sodium thiosulphate; hypochlorites and arsenious acid. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes The motif is settled by a majority of large, granular cells, which stain a distinctive yellowish-brown when the gland is fixed in a solution of bichromate of potash. The Glands Regulating Personality It was operated by a motor driven by a bichromate of soda battery. Marvels of Modern Science As he gently added the bichromate, there came a most marvelous, kaleidoscopic change. The War Terror In Fuller's bichromate cell the zinc is amalgamated with mercury, which is kept in a pool beside it by means of a porous pot. The Story of Electricity The two solutions to be employed in the process under consideration are those of potassium bichromate and ferrous sulphate. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes The batteries of bichromate of potassium of the Tissandier brothers had given a speed of four yards a second. Robur the Conqueror Muller presently discovered that bichromate of potassium in solution makes the best of fluids for the preliminary preservation and hardening of the tissues. A History of Science — Volume 4 The bichromate solution is preferably to be placed in a glass-stoppered burette. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes An ordinary negative picture is taken, and then impressed on a gelatine plate sensitised with bichromate of potash. The Story of Electricity It is possible to purify commercial potassium bichromate by recrystallization from hot water. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes The two substances most commonly used as standards for a bichromate solution are ferrous ammonium sulphate and iron wire. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes From the corrected volumes of the bichromate solution required to oxidize the iron actually know to be present in the wire, calculate the relation of the standard solution to the normal. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes PROCEDURE.—Fill a glass-stoppered burette with the permanganate solution, observing the usual precautions, and fill a second burette with the ferrous sulphate solution prepared for use with the potassium bichromate. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes As in the case of the bichromate process, it is necessary to reduce the iron completely to the ferrous condition before titration. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes Dissolve the bichromate in distilled water, transfer the solution to a liter bottle, and dilute to approximately 1000 cc. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes Proceed with the solution of the ore, and the treatment of the residue, if necessary, exactly as described for the bichromate process on page 56. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes Proceed with the solution of the ore, treat the residue, if necessary, and reduce the iron by the addition of stannous chloride, followed by mercuric chloride, as described for the bichromate process on page 56. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes |
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