| 单词 | chromic acid |
| 例句 | Fellow workers pulled Swisher from the four-foot tank of liquid chromic acid and were performing CPR when first responders arrived. Ohio metal plant worker dies after falling into chemical vat 2020-01-22T05:00:00Z The tank contained liquid chromic acid, Dayton fire officials said. Authorities say worker fell into chemical vat and died 2020-01-21T05:00:00Z 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 Therefore potassa or chromic acid cannot be utilized, because of the impossibility of limiting their effect. A System of Practical Medicine by American Authors, Vol. I Volume 1: Pathology and General Diseases 2012-03-17T02:00:54.097Z 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 Potash fusion converts it into acetic acid; nitric acid oxidizes it to acetic and oxalic acids; chromic acid mixture to acetaldehyde and acetic acid, and potassium permanganate to αβ-dioxybutyric acid. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 7 "Crocoite" to "Cuba" 2012-01-22T03:00:24.397Z 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 It is not due to the presence of chromic acid, but to a reaction between alumina and chromic oxide, which requires an elevated temperature. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 5 "Gassendi, Pierre" to "Geocentric" 2011-09-02T02:00:20.450Z Bichromates, although containing much available oxygen, form but feeble explosive mixtures, but some compounds of chromic acid with diazo compounds and some acetylides are extremely powerful as well as sensitive. Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 1 "Evangelical Church Conference" to "Fairbairn, Sir William" 2011-07-16T02:00:16.387Z On oxidation with potassium permanganate it gives homovanillin, vanillin, &c.; with chromic acid in acetic acid solution it is converted into carbon dioxide and acetic acid, whilst nitric acid oxidizes it to oxalic acid. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 8 "Ethiopia" to "Evangelical Association" 2011-03-05T03:00:24.537Z Nitric acid and chromic acid oxidize them in such a mariner that they yield the same products as the alcohols from which they are derived. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 7 "Equation" to "Ethics" 2011-02-27T03:00:31.973Z Add to this 1⁄2 pound nitrate soda, 1 ounce chromic 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 The ferrous sulphate here employed is oxidized by the chromic acid to a ferric salt, which serves as a carrier of oxygen to the aniline. Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 8 "Dubner" to "Dyeing" 2010-12-26T03:00:17.840Z Chromium trioxide dissolves readily in water, and the solution is supposed to contain chromic acid, H2CrO4; the salts of this acid are known as the chromates. Encyclopaedia Britannica, 11th Edition, Volume 3, Slice 7 "Bible" to "Bisectrix" 2010-12-20T17:12:05.780Z Carbon bisulphide slowly oxidizes on exposure to air, but by the action of potassium permanganate or chromic acid it is readily oxidized to carbon dioxide and sulphuric acid. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 3 "Capefigue" to "Carneades" It may be condensed to a dark red liquid which is decomposed by moist air into chromic acid and chromic fluoride. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 3 "Chitral" to "Cincinnati" This depolarizer is placed on the market in the form of crystals, known as sulpho-chromic salt, made by the action of sulphuric acid upon chromic 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 He found, however, that chromic acid, which he had represented as CrO6, neutralized a base containing 1/3 the 37 quantity of oxygen. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 "Châtelet" to "Chicago" Perchromic Acid.—By the addition of hydrogen peroxide to a solution of chromic acid, a fine blue coloration due to a perchromic acid is produced which is readily absorbed by shaking out with ether. Encyclopaedia Britannica, 11th Edition, Volume 3, Slice 7 "Bible" to "Bisectrix" 2010-12-20T17:12:05.780Z On immersion in a bath of chromic acid the bared surfaces are bitten into, while the unexposed parts remain unaffected. How it Works Dealing in simple language with steam, electricity, light, heat, sound, hydraulics, optics, etc., and with their applications to apparatus in common use The superficial ulcers may be touched with silver nitrate or with a 1 per cent. solution of chromic acid. Manual of Surgery Volume Second: Extremities—Head—Neck. Sixth Edition. When dissolved, its action is similar to that of the chromic acid solution. 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 Note.—A few pieces of pipe-clay or pumice may be placed in the beaker to prevent the "spurting" of the chromic acid. The Elements of Bacteriological Technique A Laboratory Guide for Medical, Dental, and Technical Students. Second Edition Rewritten and Enlarged. A saturated solution of chromic acid is also used for the same purposes. 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. In obstinate cases, glacial acetic acid or chromic acid may be cautiously employed. Essentials of Diseases of the Skin Including the Syphilodermata Arranged in the Form of Questions and Answers Prepared Especially for Students of Medicine The treatment consists in stopping the use of tobacco, and painting the patches with chromic acid, tannic acid, or alum, and employing a chlorate of potash mouth-wash. Manual of Surgery Volume Second: Extremities—Head—Neck. Sixth Edition. For intense negatives the ammonia should be discarded and replaced by the same quantity of chromic acid. Photographic Reproduction Processes Note.—After once being placed in the chromic acid, the cover-slips must on no account be touched by the fingers. The Elements of Bacteriological Technique A Laboratory Guide for Medical, Dental, and Technical Students. Second Edition Rewritten and Enlarged. A subcutaneous injection of one-fourth dram of 1 per cent solution of chromic acid above the wound is also beneficial. Special Report on Diseases of the Horse If this be the case, the citrine cast of the brown oxide is easily explained, as well as the gradual addition to its green by the deoxidation of the chromic acid. Field's Chromatography or Treatise on Colours and Pigments as Used by Artists Like manganese, chromium forms two unstable acids, namely, chromic acid and dichromic acid. An Elementary Study of Chemistry The second from an imperfect knowledge of the properties of gelatine acted on by light in presence of a salt of chromic acid. Photographic Reproduction Processes The dirt usually rubs off easily, as it has become friable from contact with the chromic acid. The Elements of Bacteriological Technique A Laboratory Guide for Medical, Dental, and Technical Students. Second Edition Rewritten and Enlarged. No nucleus can be seen in the living plant, but by treatment with chromic acid and staining, numerous very small nuclei may be demonstrated. Elements of Structural and Systematic Botany For High Schools and Elementary College Courses The new metal thallium yields in combination with chromic acid two yellow colours, a pale and an orange. Field's Chromatography or Treatise on Colours and Pigments as Used by Artists They can play the part of metals and also form acids resembling chromic acid in formula. An Elementary Study of Chemistry Some dye-stuffs, such as logwood for blacks, work best when the wool is mordanted with chromic acid, which is effected when sulphuric acid is the assistant mordant. The Dyeing of Woollen Fabrics Immerse in chromic acid, 5 per cent. aqueous solution, for one minute; wash in water. The Elements of Bacteriological Technique A Laboratory Guide for Medical, Dental, and Technical Students. Second Edition Rewritten and Enlarged. Picric acid is used as a saturated solution in distilled water, and the specimen may remain for about the same length of time as in the chromic acid. Elements of Structural and Systematic Botany For High Schools and Elementary College Courses It has been supposed that hydrated brown oxide of chromium is not a distinct compound of chromium and oxygen, but a feeble union of the green oxide with chromic acid. Field's Chromatography or Treatise on Colours and Pigments as Used by Artists Heated with chromic acid solution to 140� C., it gives carbon dioxide and acetone. Encyclopaedia Britannica, 11th Edition, Volume 4, Part 4 "Bulgaria" to "Calgary" In lesions of the mouth and throat, the teeth should be attended to; the best local application is a solution of chromic acid—10 grains to the ounce—painted on with a brush once daily. Manual of Surgery Volume First: General Surgery. Sixth Edition. Bichromate of potash with sulphuric acid gives sulphate of potash and chromic acid. The Chemistry of Hat Manufacturing Lectures Delivered Before the Hat Manufacturers' Association But the E.M.F. has a decidedly different value in a cell composed of iron, copper, and chromic acid. General Science The remainder of the chromic acid combines with the sulphuric acid to form chromium sulphate. Cyclopedia of Telephony & Telegraphy Vol. 1 A General Reference Work on Telephony, etc. etc. 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 PROCEDURE.—To calibrate a flask for !contents!, proceed as follows: Clean the flask, using a chromic acid solution, and dry it carefully outside and inside. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes Glycerine is not adapted for white fibrous tissue or blood vessels, unless they have been hardened in chromic acid, as it causes the white fibers to swell up and lose their normal features. Scientific American Supplement, No. 492, June 6, 1885 Because a sixth of it is chromic acid, while other gems, as the garnet, are coloured by oxide of iron. The Mirror of Literature, Amusement, and Instruction Volume 20, No. 560, August 4, 1832 Quinine, C20H24N2O2, when carefully oxidized with chromic acid or potassium permanganate, yields a series of products. Scientific American Supplement, No. 415, December 15, 1883 I at once telegraphed to London for Morgan, and, between him and Johnson, they have been opening my trachea, and burning my inside with chromic acid and the galvanic cautery. The Purple Cloud Reduction by sodium amalgam converts it into isopropyl alcohol; oxidation by chromic acid gives carbon dioxide and acetic acid. The Project Gutenberg Encyclopedia Volume 1 of 28 This may be used to mount unsoftened bone and tooth, hair, brain, and spinal column, and most tissues that have been hardened in alcohol or chromic acid, which require to have their transparency increased. Scientific American Supplement, No. 492, June 6, 1885 When hydrochloric acid is added to bichromate of potash, chromic acid is liberated. Scientific American Supplement, No. 384, May 12, 1883 Quinidine yields with chromic acid the same decomposition products as quinine. Scientific American Supplement, No. 415, December 15, 1883 Other substances which would answer the same purpose would be dilute solutions of picric or chromic acid, of not more than one to one-half per cent., or one part to two hundred of water. Scientific American Supplement, No. 392, July 7, 1883 The solution may be repeatedly passed through the battery until the absence of the characteristic warmth of color of chromic acid indicates its complete exhaustion. Scientific American Supplement, No. 363, December 16, 1882 The spleen and portions of the thin abdominal muscles may be placed in a solution of three drachms chromic acid to one quart of water, and transferred to alcohol after three or four weeks. Scientific American Supplement, No. 492, June 6, 1885 Another action of chromic acid is, that it destroys the action of light on silver bromide, so that up to this point operations can be carried on in broad daylight. Scientific American Supplement, No. 384, May 12, 1883 Heratol changes, somewhat obscurely, in colour as it becomes spent, its original orange tint, due to the chromic acid, altering to a dirty green, characteristic of the reduced salts of chromium oxide. 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 "Heratol," a solution of chromic acid or sulphuric acid absorbed in porous earth. Oxy-Acetylene Welding and Cutting Electric, Forge and Thermit Welding together with related methods and materials used in metal working and the oxygen process for removal of carbon As this waste of chromic acid involves also a corresponding loss of gas, small purifiers are preferable, because at any moment they only contain a small quantity of material capable of attacking the acetylene itself. 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 |
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