| 单词 | ferric |
| 例句 | There was an omnipresent smell of sewage: ferric and sharp. My parents sent me to Russia for a month, aged 13 – never again 2017-07-15T04:00:00Z The humbly unalloyed ferric stuff doesn't just command our respect. Iron Man v Man of Steel: who will dominate? 2013-04-29T12:07:01Z As a precaution, however, we are monitoring the situation due to the use of ferric sulphate in some waste treatment works. Water companies face chemical supply disruption 2021-09-07T04:00:00Z A chemical spill caused sodium hypochlorite to mix with ferric sulfate at a Birmingham Water Works treatment plant near Highway 280, AL.com reported. Chemical spill at Alabama water treatment plant sends 54 to hospitals 2019-02-27T05:00:00Z Authorities tell news outlets that irritating gas caused by a mixture of ferric sulfate and sodium hypochlorite was causing breathing problems for about a dozen workers. Alabama chemical spill sends dozens to hospitals 2019-02-27T05:00:00Z The tape is made of paper-thin polyurethane coated with a slurry made of ferric oxide and carbon black. Springfield factory makes cassette tape 2018-01-11T05:00:00Z The drink does contain ammonium ferric citrate, which is technically iron, but it is not brewed. Irn Bru, a Scottish Favorite, Loses Some Sugar 2018-01-05T05:00:00Z Scrub it with cupric nitrate for greenish tones, with ferric for a brownish red. Tommy Trojan, meet your female counterpart 2017-08-17T04:00:00Z In his soft, ferric voice, he said, “Oh.” The Art of Omission 2015-09-14T04:00:00Z With spray bottles, they applied both cupric nitrate and ferric nitrate to the metal, then distributed and smoothed the sizzling liquid with mop-shaped brushes. Restoring a Lackluster World’s Fair Sculpture for Legacy’s Sake 2015-07-01T04:00:00Z The truck was carrying 3,400 gallons of a ferric chloride solution, which is toxic and corrosive. Spill of ferric chloride being cleaned up on I-95 2015-01-08T05:00:00Z Finally, they spray the whole lot with a solution of ferric nitrate and heat it again to create the coverings. Tiny balls of fire 2014-06-26T04:00:00Z Once upon a time, on audio cassettes, perhaps a nice ferric C90, bedroom musos poured their creative energy into bringing a cornucopia of different acts together. Does it take skill to make a mixtape? 2013-09-05T13:26:01Z The resulting dark-brown pigment may remain at the seat of the hemorrhage indefinitely, and may be accompanied with reddish-brown flakes, which, as shown by Kunkel,43 are composed of hydrated ferric oxide. A System of Practical Medicine by American Authors, Vol. I Volume 1: Pathology and General Diseases 2012-03-17T02:00:54.097Z By converting ferrous into ferric oxide the green tint is changed to yellow, which is less noticeable. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 1 "Gichtel, Johann" to "Glory" 2012-01-11T03:00:20.463Z The ferric chloride is being transferred to another trailer. Spill of ferric chloride being cleaned up on I-95 2015-01-08T05:00:00Z Rub the spots with strong aqueous solution of ferric chloride, and dry before applying the dressing. Scientific American, Vol. XXXIX.?No. 24. [New Series.], December 14, 1878 A Weekly Journal Of Practical Information, Art, Science, Mechanics, Chemistry, And Manufactures 2012-01-05T03:00:31.783Z It seems to be a sublimation-product formed in volcanoes by the interaction of the vapour of ferric chloride and steam. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 7 "Gyantse" to "Hallel" 2011-12-26T03:00:11.613Z Cyanotype is a photographic medium that uses ferric ammonium citrate, potassium ferricyanide, and simple sunlight to make an image. The Surprising Subject of the First Book of Photographs 2011-12-23T18:45:04.903Z Thus iron protoxide is now generally known as ferrous oxide, and iron peroxide as ferric oxide. Heroes of Science Chemists 2011-12-09T03:00:21.047Z The presence of much ferric oxide gives the rose colour referred to by Agricola. De Re Metallica, Translated from the First Latin Edition of 1556 2011-11-16T03:00:21.977Z In solution minute quantities of gold may be detected by the formation of “purple of Cassius,” a bluish-purple precipitate thrown down by a mixture of ferric and stannous chlorides. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 2 "Gloss" to "Gordon, Charles George" 2011-10-31T02:00:28.703Z Ochre is a hydrated ferric oxide permeating a clay base, largely used as a tinting material. Paint Technology and Tests 2011-09-15T02:00:12.263Z On exposure to ultraviolet light, the compounds react to form a dye called Prussian Blue, or ferric ferrocyanide. The Surprising Subject of the First Book of Photographs 2011-12-23T18:45:04.903Z It consists of clear crystalline sapphire coloured with a small quantity of ferric oxide. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 5 "Gassendi, Pierre" to "Geocentric" 2011-09-02T02:00:20.450Z With ferric salts its solution gives a deep blue colour, and with ferrous salts, after exposure to the air, an insoluble, blue-black, ferroso-ferric gallate. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 4 "G" to "Gaskell, Elizabeth" 2011-08-24T02:00:20.690Z The precipitate of ferric phosphate is then treated as in the ordinary estimation of phosphates. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 3 "Frost" to "Fyzabad" 2011-08-15T02:00:28.473Z Tests were also made with dilute solutions of other salts such as ferric chloride, having a dilute solution of potassium sulpho-cyanide on the reverse side of the apparatus. Paint Technology and Tests 2011-09-15T02:00:12.263Z The powder was simply pulverized vitriol, that is, ferric sulphate, or sulphate of iron. The Seven Follies of Science [2nd ed.] A popular account of the most famous scientific impossibilities and the attempts which have been made to solve them. 2011-06-30T02:00:34.290Z Impure limestones, frequently coloured or clouded with red, due to ferric oxide, are quarried on an extensive scale in eastern Tennessee, and are used for decorative purposes. North America 2011-05-05T02:00:20.027Z The word “flocculent” is used of many substances which have a fleecy or “flock”-like appearance, such as a precipitate of ferric hydrate. Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 5 "Fleury, Claude" to "Foraker" 2011-04-03T02:00:20.883Z The residue is dissolved in hydrochloric acid, a few drops of ferric chloride added, and then ammonia in excess. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 3 "Frost" to "Fyzabad" 2011-08-15T02:00:28.473Z His first major product was the development of a tape recorder: he heated ground iron in a frying pan to collect the ferric oxide he needed to make magnetic tape. Nobutoshi Kihara, Sony Engineer, Dies at 84? 2011-02-28T02:56:37Z The Curb Pins sometimes produce the ferric oxide mentioned by their action on the hairspring. Friction, Lubrication and the Lubricants in Horology 2011-01-20T03:00:07.073Z 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 Iron.—The methods used in the assay for iron are volumetric, and are all based on the property possessed by certain reagents of oxidizing iron from the ferrous to the ferric state. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 7 "Arundel, Thomas" to "Athens" Then, if available, freshly precipitated ferric hydrate must be given, which can be prepared by adding a solution of ammonia to one of iron perchloride. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 6 "Armour Plates" to "Arundel, Earls of" It is basic in character, and gives a red coloration on the addition of ferric chloride. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 2 "Anjar" to "Apollo" The molecules of iron, uniting with the molecules of oxygen which exist in the oil in its oxidized state, forms ferric oxide. Friction, Lubrication and the Lubricants in Horology 2011-01-20T03:00:07.073Z For amongst minerals, no material is so ample; all metals, and all stones distinct from iron, are outdone by ferric and ferruginous matter. On the magnet, magnetick bodies also, and on the great magnet the earth a new physiology, demonstrated by many arguments & experiments This solution, which should not exceed 50 cc. or 75 cc. in volume, contains the iron in the ferric state and is ready for reduction. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 7 "Arundel, Thomas" to "Athens" Only soluble ferric compounds seem to serve as a suitable source of supply of the element; ferrous compounds being usually highly toxic to plants. The Chemistry of Plant Life A precipitate of ferric phosphates first forms, but upon the addition of a few more drops of the same solution it is dissolved. Dietetics for Nurses English hydraulic limes are of a different class; they contain a good deal of alumina and ferric oxide, and in composition resemble somewhat irregular Portland cement. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 6 "Celtes, Konrad" to "Ceramics" For the earth hath of her store plenty of iron in her highlands, and the globe contains the ferric and magnetick element in rich abundance. On the magnet, magnetick bodies also, and on the great magnet the earth a new physiology, demonstrated by many arguments & experiments One of the most important is the Friedel and Craft’s reaction, in which an aromatic compound combines with an alkyl haloid in the presence of aluminium, zinc or ferric chloride. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 5 "Cat" to "Celt" Third, they form soluble, dark-blue or greenish-black compounds with ferric salts, the common inks. The Chemistry of Plant Life The red colour of typical carnelian is due to the presence of ferric oxide. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 4 "Carnegie Andrew" to "Casus Belli" With ferric chloride it gives a violet coloration, and with bromine water a white precipitate of tribrom-phenol. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 3 "Capefigue" to "Carneades" Thus this ferric and telluric nature is included and taken up in various bodies of stones, ores, and earths; so too it differs in aspect, in form, and in efficiency. On the magnet, magnetick bodies also, and on the great magnet the earth a new physiology, demonstrated by many arguments & experiments "Citrate of iron and ammonium" is a double salt formed of ferric citrate and citrate of ammonium, and comes in brown shining leaflets. Harper's Round Table, August 27, 1895 The distribution of the calcite may be rendered more clear by using ferric chloride solution. Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 6 "Dodwell" to "Drama" The dust had originally been red ferric sand. Big Stupe C. Its aqueous solution is coloured bluish-violet by ferric chloride. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 6 "Coucy-le-Château" to "Crocodile" The heaps are moistened with ferric chloride solution, and the reaction is maintained by the liquid percolating through the heap. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 3 "Convention" to "Copyright" Iodine, antimony trichloride, molybdenum pentachloride, ferric chloride, ferric oxide, antimony, tin, stannic oxide and ferrous sulphate have all been used as chlorine carriers. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 3 "Chitral" to "Cincinnati" This is decomposed, leaving a yellow stain of ferric hydrate where the calcite occurred. Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 6 "Dodwell" to "Drama" If silica be present, it gives the iron bead when heated with a little ferric oxide; if tin is present there is no change. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 "Châtelet" to "Chicago" C. It is soluble in water, and the aqueous solution gives a blue coloration with ferric chloride. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 6 "Coucy-le-Château" to "Crocodile" The conversion into sulphate is generally effected by the oxidizing processes of weathering, calcination, heating with iron nitrate or ferric sulphate. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 3 "Convention" to "Copyright" The precipitate is first submitted to the action of ferric chloride to dissolve the copper, and the residue is fused with charcoal and soda to separate the selenium. The Galaxy, Volume 23, No. 2, February, 1877 A paper is coated with a solution of ferric oxalate and platinum salts and then exposed behind a negative. Crayon Portraiture Complete Instructions for Making Crayon Portraits on Crayon Paper and on Platinum, Silver and Bromide Enlargements If phosphoric acid is absent, aluminium, chromium and ferric hydrates are precipitated. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 "Châtelet" to "Chicago" To the filtrate and washings add 5 cc. of a saturated solution of ferric alum and a few cc. of nitric acid. All About Coffee This consists in stacking the broken ore in heaps and adding a mixture of sodium sulphate and ferric 107 chloride in the proportions necessary for the entire conversion of the iron into ferric sulphate. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 3 "Convention" to "Copyright" The quartz sometimes shows bubbles containing liquid, gas, and small heavy crystals, probably of ferric oxide, as in the Clifton-Morenci district of Arizona. The Economic Aspect of Geology Carefully neutralise the remainder and add ferric chloride solution. The Elements of Bacteriological Technique A Laboratory Guide for Medical, Dental, and Technical Students. Second Edition Rewritten and Enlarged. If, however, phosphoric acid is present in the original substance, we may here obtain a precipitate of the phosphates of the remaining metals, together with aluminium, chromium and ferric hydrates. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 "Châtelet" to "Chicago" Lead and zinc chromates, Prussian blue, ferric oxid, coal-tar colors, and other substances of a harmful nature, have been employed for this purpose, being made to adhere to the beans with adhesives. All About Coffee Chalcopyrite is decomposed by nitric acid with separation of sulphur and formation of a green solution; ammonia added in excess to this solution changes the green colour to deep blue and precipitates red ferric hydroxide. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 3 "Convention" to "Copyright" Silver is less soluble than copper and zinc, but more soluble than gold; and to some extent it is removed in solution, particularly where the oxidation of pyrite forms ferric sulphate. The Economic Aspect of Geology In some species colouring matter or ferric oxide is stored in the capsule. The Elements of Bacteriological Technique A Laboratory Guide for Medical, Dental, and Technical Students. Second Edition Rewritten and Enlarged. In this case, the precipitate is dissolved in as little as possible hydrochloric acid and boiled with ammonium acetate, acetic acid and ferric chloride. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 "Châtelet" to "Chicago" A dark green coloration is given with ferric chloride; and upon boiling it with alkalies or dilute acids, caffeic acid and glucose are formed. All About Coffee The conversion of copper sulphide into the chlorides may be accomplished by calcining with common salt, or by treating the ores with ferrous chloride and hydrochloric acid or with ferric chloride. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 3 "Convention" to "Copyright" The borax extract, if subsequently treated with hydrochloric acid, should not turn red, nor become blue on the further addition of ferric chloride. Scientific American Supplement, No. 647, May 26, 1888 To the filtrate add a few drops of 1 per cent. aqueous solution of ferric chloride. The Elements of Bacteriological Technique A Laboratory Guide for Medical, Dental, and Technical Students. Second Edition Rewritten and Enlarged. The next group precipitate may contain the white gelatinous aluminium hydroxide, the greenish chromium hydroxide, reddish ferric hydroxide, and possibly zinc and manganese hydroxides. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 "Châtelet" to "Chicago" The ferric hydroxide accumulates in the sheath, and gradually passes into the more insoluble ferric oxide. Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 2 "Baconthorpe" to "Bankruptcy" The ferrous chloride formed at the same time is converted into ferric chloride which can be used to moisten the heaps. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 3 "Convention" to "Copyright" Solutions of stannous chloride and ferric chloride with the aid of heat ought entirely to destroy the blue coloring matter. Scientific American Supplement, No. 647, May 26, 1888 The presence of this dangerous impurity is easily detected by adding ferric chloride, which, in presence of the sulphocyanate, produces a blood-red colour. Manures and the principles of manuring For example, when a solution of a ferric salt is added to a solution of potassium thiocyanate, a deep red coloration is produced, owing to the formation of ferric thiocyanate. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 "Châtelet" to "Chicago" The chemical change consists in the formation of ferric tartrate. Photographic Reproduction Processes Ores in which the copper is present as oxide or carbonate are soluble in sulphuric or hydrochloric acids, ferrous chloride, ferric sulphate, ammoniacal compounds and sodium thiosulphate. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 3 "Convention" to "Copyright" When we say that oxygen and iron unite and form ferric oxide, we express a law of matter: that is, that these elements have an affinity for each other. Report on Surgery to the Santa Clara County Medical Society It is possible that gypsum may act as an oxidising agent in the soil, just as iron in the ferric condition does. Manures and the principles of manuring Rust.—For instance, iron is largely composed of ferric acid. Electricity for Boys It is important to prepare the solution as directed, for by adding the ferric chloride before tartaric acid, the gum arabic would be at once coagulated. Photographic Reproduction Processes It was subjected to a series of treatments with ferric ferricyanide, and the proportion of Prussian blue fixed was determined by increase of weight, viz. from 10 p.ct. to 47 p.ct. according to the conditions. Researches on Cellulose 1895-1900 Lime, bog ore, and various metallic salts, such as ferric chloride, barium chloride, and copper sulphate have been suggested, and in some instances are used instead of aluminium sulphate, but the latter is generally employed. The Handbook of Soap Manufacture It is possible, however, as held by some, that ferric oxide is capable of inducing this conversion. Manures and the principles of manuring Why in this test is it necessary to use acid containing ferric chlorid? Human Foods and Their Nutritive Value The following uranium process gives black impressions: In a saturated solution of tartaric acid dissolve freshly precipitated ferric oxide, and keep the solution—ferric tartrate—in the dark. Photographic Reproduction Processes The changes which take place when a ferric salt is converted into a ferrous salt are the reverse of the ones just described. An Elementary Study of Chemistry This may be readily detected by adding to a small quantity of the oil two or three drops of caustic soda solution, and a few drops of ferrous sulphate solution containing ferric salt. The Handbook of Soap Manufacture The most important substances present in soils are as follows: silica, alumina, lime, magnesia, potash, soda, ferric oxide, manganese oxide, sulphuric acid, phosphoric acid, and chlorine. Manures and the principles of manuring A decoction of logwood treated with tannin gives yellow red, with sugar of lead gives gray brown, with ferric nitrate gives black. Handwork in Wood This defect may result from various causes, viz.: 1st. The stock ferric oxalate solution is impaired by a partial reduction of the ferric salt into ferrous oxalate. Photographic Reproduction Processes Account for the fact that a solution of sodium carbonate, when added to a solution of a ferric salt, precipitates an hydroxide and not a carbonate. An Elementary Study of Chemistry The smoke thus produced reduces the red ferric oxide to blue-green ferrous oxide, or to metallic iron, which combines with the silica present to form a fusible ferrous silicate. Encyclopaedia Britannica, 11th Edition, Volume 4, Part 3 "Brescia" to "Bulgaria" It forms ferric arsenate, which is sparingly soluble. Aids to Forensic Medicine and Toxicology Examine pieces of the metal and also some of its compounds, as ferrous sulphate, ferric chloride, and ferric oxide or iron rust. Physiology and Hygiene for Secondary Schools We call specially the attention of the reader to the process of Poitevin, by which one can experiment with every ferric salts, citrate, lactate, oxalate, tartrate, benzoate, etc., by simply exciting with the corresponding acid. Photographic Reproduction Processes When an alkali sulphate in proper quantity is added to ferric sulphate in solution an iron alum is formed, and is easily obtained in large crystals. An Elementary Study of Chemistry The action of bromine is sometimes accelerated by the use of compounds which behave catalytically, the more important of these substances being iodine, iron, ferric chloride, ferric bromide, aluminium bromide and phosphorus. Encyclopaedia Britannica, 11th Edition, Volume 4, Part 3 "Brescia" to "Bulgaria" In the red and brown iron ores and ochres ferric iron is present; in chalybite the iron is in the ferrous state; and in magnetite it is present in both forms. A Text-book of Assaying: For the Use of Those Connected with Mines. In wool scouring, cotton bleaching, and other processes requiring the use of alkaline carbonates, ferric oxide is precipitated on the fibre. The Chemistry of Hat Manufacturing Lectures Delivered Before the Hat Manufacturers' Association The precipitate—ferric oxide—is now washed in warm water until the last washing water is quite neutral to test paper, then drained and mixed with 200 parts of pure crystallized oxalic acid. Photographic Reproduction Processes They are commonly used when a pure ferric salt is required. An Elementary Study of Chemistry Pink, odorless, tasteless powder of zinc oxide with a small amount of ferric oxide, dissolved in mineral oils and used in skin lotions. Mother's Remedies Over One Thousand Tried and Tested Remedies from Mothers of the United States and Canada When the iron in the solution much exceeds 0.2 gram the volumetric determination is generally adopted, as the bulkiness of the precipitate of ferric hydrate makes the gravimetric method very inconvenient. A Text-book of Assaying: For the Use of Those Connected with Mines. The deposit consisting of ferrous and ferric phosphates mixed with black iron oxide may be varied in composition, texture and color. Creative Chemistry Descriptive of Recent Achievements in the Chemical Industries The orange color indicates the complete reduction of the ferric oxalate. Photographic Reproduction Processes When solutions of ferric salts are treated with ammonium hydroxide, ferric hydroxide is formed as a rusty-red precipitate, insoluble in water. An Elementary Study of Chemistry The ferric oxalate is removed by the acid baths which follow the development. Scientific American Supplement, No. 711, August 17, 1889 The small quantity of white flocculent precipitate which may be observed in the acetic acid solution before titrating, contains the whole of the iron as ferric arsenate. A Text-book of Assaying: For the Use of Those Connected with Mines. For example, with alum and oxalic acid as a mordant and logwood as a dye, blue is obtained; but with a mordant of ferric sulphate and a dye of logwood, blacks and grays result. General Science From time to time processes are published under “queer” names, which are based on the well known actions of reagents on the ferric salts reduced by light. Photographic Reproduction Processes Write the equations showing how each of the following compounds of iron could be obtained from the metal itself: ferrous chloride, ferrous hydroxide, ferrous sulphate, ferrous sulphide, ferrous carbonate, ferric chloride, ferric sulphate, ferric hydroxide. An Elementary Study of Chemistry To appreciate the difficulty of arriving at a correct conclusion, it must be remembered that the silver precipitate is obtained saturated with strong solutions of ferric and ferrous citrate, sodium citrate, sulphate, etc. Scientific American Supplement, No. 711, August 17, 1889 Hence the sulphuretted hydrogen must be boiled off and the iron removed as basic ferric acetate by the method described on p. A Text-book of Assaying: For the Use of Those Connected with Mines. Precipitates from ferric sulphate, unlike calcic compounds, do not subsequently enter into putrefaction. Scientific American Supplement, No. 832, December 12, 1891 Although aniline is but feebly basic, it precipitates zinc, aluminium and ferric salts, and on warming expels ammonia from its salts. Encyclopaedia Britannica, 11th Edition, Volume 2, Part 1, Slice 1 Like iron they form two series of compounds, but the salts corresponding to the ferrous salts are the most common, the ones corresponding to the ferric salts being difficult to obtain. An Elementary Study of Chemistry The salt should be carefully tested with ferric chloride for the presence of ferrocyanides, which give a blue color with ferric salts. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes An assay should not be worked with ferric hydrate present, unless the standard contains about the same amount of it. A Text-book of Assaying: For the Use of Those Connected with Mines. Morphine, C17H19NO3, is a tertiary amine, and appears to contain a hydroxyl group like phenols, to which class of bodies it has some analogies, as is shown in its reaction with ferric chloride. Scientific American Supplement, No. 415, December 15, 1883 The Edison dynamo, with its large masses of iron, was a vivid contrast to the then existing types with their meagre quantities of the ferric element. Edison, His Life and Inventions Those compounds in which the iron is divalent are known as ferrous compounds, while those in which it is trivalent are known as ferric. An Elementary Study of Chemistry Preference is here given to iron crucibles, because the resulting ferric hydroxide is more readily brought into solution than the nickelic oxide from a nickel crucible. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes This can be counteracted by precipitating in both solutions a mixture of ferric and aluminic hydrates, which settles readily and leaves the supernatant liquor clear. A Text-book of Assaying: For the Use of Those Connected with Mines. Its value as a paint is due to the presence of ferric oxide, of which it contains more than any of the French, Australian, American, Irish, or Welsh ochres. Martin Luther King, Jr. Day, 1995, Memorial Issue Agate is stained red, so as to form carnelian and sardonyx, by means of ferric oxide. The Project Gutenberg Encyclopedia Volume 1 of 28 The most efficient antidote for arsenic poisoning is ferric hydroxide. An Elementary Study of Chemistry 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 Ferrous compounds are converted into ferric by the action of an oxidising agent in the presence of an acid. A Text-book of Assaying: For the Use of Those Connected with Mines. The manganese peroxide dissolves very readily, transforming its equivalent of ferrous sulphate into ferric sulphate. Scientific American Supplement, No. 401, September 8, 1883 Everybody must pretend to be somebody else, and young girls, in particular, must go disguised as boys, amid much cut-and-thrust work, both ferric and verbal. Gallantry Dizain des Fetes Galantes Take of this 10 cubic centimeters, add 1 drop of a test solution of ferric chloride; an evanescent blue color is formed, passing quickly into a red color. Scientific American Supplement, No. 363, December 16, 1882 The active agent may be considered to be !nascent! hydrogen, and it must be borne in mind that the visible bubbles are produced by molecular hydrogen, which is without appreciable effect upon ferric iron. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes The reduction is hastened by warming, and is complete when the solution is quite colourless and a drop of the liquid tested with sulphocyanate of potassium gives no reaction for ferric iron. A Text-book of Assaying: For the Use of Those Connected with Mines. When the examination is made in the above manner, it is impossible to separate the two metals, for the peroxide will bring down with it a considerable quantity of ferric hydrate. Scientific American Supplement, No. 299, September 24, 1881 Others—the alums, ferrous sulphate, ferric chloride, magnesic and aluminic chlorides, bleaching powder, camphor, salicylic acid, chloroform, creosote, and carbolic acid—decidedly arrested the development of bacteria. Scientific American Supplement, No. 288, July 9, 1881 Thus the ultimate products are phosphoric acid and ferrous chloride, which on exposure to air is oxidised to ferric chloride and 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 If ferric nitrate is also present, the slightest excess of the thiocyanate over that required to combine with the silver is indicated by the deep red which is characteristic of the thiocyanate test for iron. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes Calculate the percentages of ferrous, ferric, and total iron. A Text-book of Assaying: For the Use of Those Connected with Mines. The reactions with ferric chloride and gelatine should be especially noted, since they are analogous to those given by natural tannins. Synthetic Tannins The acid residue, which contained the potassium sulphate, was shaken with ether; after the evaporation of the ether there remained a crystalline mass having an acid reaction which was colored violet with ferric chloride. Scientific American Supplement, No. 288, July 9, 1881 Cuprous chloride is used as a solution in strong hydrochloric acid mixed with ferric chloride, and similarly absorbed in kieselguhr. 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 Amorphous substances, such as ferric hydroxide, aluminium hydroxide, or silicic acid, separate in a gelatinous form and are relatively difficult to filter and wash. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes Thus, in assaying silver, the oxide of lead or metallic lead used is rarely free from silver; and in the case of arsenic, the acids, zinc or ferric chloride are sure to contain arsenic. A Text-book of Assaying: For the Use of Those Connected with Mines. The ferric oxide of the cement is unaffected by sea- water. The Sewerage of Sea Coast Towns The aqueous solution of the purified crystalline scales then gave with ferric chloride only a small flesh-colored precipitate. Scientific American Supplement, No. 288, July 9, 1881 This mercuric chloride is said to form an additive compound with the phosphine of the crude acetylene, which compound is decomposed by the ferric chloride, and the mercuric chloride recovered. 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 Heat the solution to boiling, and allow the precipitated ferric hydroxide to settle. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes Iron, if present, interferes by forming a white flocculent precipitate of ferric arsenate after the addition of the sodium acetate and preliminary to the titration. A Text-book of Assaying: For the Use of Those Connected with Mines. After a few hours inject 4 drachms of ferric chloride in 1 ounce of water. One Thousand Questions in California Agriculture Answered The ferrous sulphate combines with the nitric acid, forming two new salts—ferric nitrate and ferric sulphate. Scientific American Supplement, No. 288, July 9, 1881 This gives rise to two kinds of salts, ferrous and ferric, as in FeCl2 and Fe2Cl6 The valence of Fe in ferric salts is 4. An Introduction to Chemical Science Moreover, at the boiling temperature, the ferric sulphate produced by the oxidation hydrolyzes in part with the formation of a basic ferric sulphate, which also tends to separate from solution. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes Ferricyanide of potassium gives a blue precipitate or green coloration; with ferric salts a brown colour only is produced. A Text-book of Assaying: For the Use of Those Connected with Mines. Also many lodes contain hard heavy ferric ores, such as titanic iron, tungstate of iron, and hematite, in which gold is held. Getting Gold: a practical treatise for prospectors, miners and students Initial blackness can also be ensured by oxidizing 21 per cent of the ferrous-sulphate without adding the extra acid necessary to the formation of a ferric salt. Forty Centuries of Ink or, a chronological narrative concerning ink and its backgrounds, introducing incidental observations and deductions, parallels of time and color phenomena, bibliography, chemistry, poetical effusions, citations, anecdotes and curiosa together with some evidence respecting the evanescent character of most inks of to-day and an epitome of chemico-legal ink. Write the symbols for ferrous and ferric hydrate; for the oxides; for the nitrates. An Introduction to Chemical Science The nitric oxide is driven out by heat, and the solution then shows by its color the presence of ferric compounds. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes When nitric acid, or the fusion method, has been used, the metal will be in solution in the ferric state, no matter in what condition it existed in the ore. A Text-book of Assaying: For the Use of Those Connected with Mines. On exposure to the air it loses water, and is gradually converted into basic ferric sulphate. Bygone Beliefs: being a series of excursions in the byways of thought Treated finished paper with ferric- oxide salts and with ferrocyanides insoluble in water but soluble in acids. Forty Centuries of Ink or, a chronological narrative concerning ink and its backgrounds, introducing incidental observations and deductions, parallels of time and color phenomena, bibliography, chemistry, poetical effusions, citations, anecdotes and curiosa together with some evidence respecting the evanescent character of most inks of to-day and an epitome of chemico-legal ink. The blood of vertebrates owes its color to ferric salts. An Introduction to Chemical Science Fold the top of the filter paper over the moist precipitate of ferric hydroxide and transfer it cautiously to the crucible. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes The weight of the ferric oxide has already been determined in the first portion: deduct it, and the difference is the weight of alumina. A Text-book of Assaying: For the Use of Those Connected with Mines. On dissolving in hydrochloric acid, neutralising with ammonia, adding 5 c.c. of sodic acetate, diluting, and boiling, it reappears as a white precipitate of ferric arsenate. A Text-book of Assaying: For the Use of Those Connected with Mines. The precipitate of the ammonic-magnesic arsenate will contain the whole of the iron as ferric hydrate. A Text-book of Assaying: For the Use of Those Connected with Mines. On being heated, ferrous salts are oxidized to ferric, and their color is changed to red. An Introduction to Chemical Science The heat from the burner is thus reflected into the crucible and dries the precipitate without danger of loss as the result of a sudden generation of steam within the mass of ferric hydroxide. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes Separation.—In the usual course of an analytical separation the hydrate of titanium will be thrown down with ferric hydrate, &c., on the addition of ammonic chloride and ammonia. A Text-book of Assaying: For the Use of Those Connected with Mines. It is convenient to speak of the iron in a ferrous salt as ferrous iron, and when in the ferric state as ferric iron. A Text-book of Assaying: For the Use of Those Connected with Mines. If the 10 c.c. of the assay solution gave a colour requiring more than 5 or 6 c.c. of the standard ferric chloride solution, repeat the determination, taking a smaller proportion. A Text-book of Assaying: For the Use of Those Connected with Mines. Solutions of ferrous salts will gradually change to ferric, if allowed to stand, thus showing the greater stability of the latter. An Introduction to Chemical Science Iron is usually found in the precipitate of barium sulphate when thrown down from hot solutions in the presence of ferric salts. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes Phosphoric Oxide.—This is determined by dissolving the ferric acetate precipitate from the manganese separation in hydrochloric acid, adding ammonia in excess, and passing sulphuretted hydrogen. A Text-book of Assaying: For the Use of Those Connected with Mines. The ferric hydrate was dissolved in dilute acid, and reprecipitated, dried, ignited, and weighed. A Text-book of Assaying: For the Use of Those Connected with Mines. Calculate the percentage as ferrous oxide, unless there are reasons to the contrary, also calculate its weight as ferric oxide. A Text-book of Assaying: For the Use of Those Connected with Mines. The reddish brown hue so often observed in soils and rocks results from ferric salts. An Introduction to Chemical Science The contamination of the barium sulphate by iron is much less in the presence of ferrous than ferric salts. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes Add ammonia in slight excess, boil, filter, dry, ignite, and weigh the precipitate as ferric oxide. A Text-book of Assaying: For the Use of Those Connected with Mines. This method is more especially adapted for the assay of liquors containing much ferric iron and of those oxidised ores which are completely soluble in hydrochloric acid. A Text-book of Assaying: For the Use of Those Connected with Mines. Take 60 c.c. of the standard ferric chloride solution, add 20 c.c. of hydrochloric acid, boil and titrate in the same way as before. A Text-book of Assaying: For the Use of Those Connected with Mines. Add 10 grams of sodic acetate, and ferric chloride until the precipitate turns brown; dilute with water to half a litre, boil, and titrate with standard baric chloride, as described under Sulphur. A Text-book of Assaying: For the Use of Those Connected with Mines. Collect the precipitate on the filter already used, wash it free from chlorides with hot water, and ignite and weigh as described for ferric hydroxide on page 110. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes These generally consist of ferric oxide and alumina. A Text-book of Assaying: For the Use of Those Connected with Mines. At this stage bring the solution to the same level by diluting, and make a further addition of the standard ferric chloride solution till the colours correspond. A Text-book of Assaying: For the Use of Those Connected with Mines. Calculate from the following determinations the percentages of ferrous, ferric, and total iron in the sample of ore used. A Text-book of Assaying: For the Use of Those Connected with Mines. If iron is present it must be removed, since ferrous salts use up much cyanide, forming ferrocyanides, and ferric salts yield ferric hydrate, which obscures the end reaction. A Text-book of Assaying: For the Use of Those Connected with Mines. The aluminium is then determined by difference, after subtracting the weight of ferric oxide corresponding to the amount of iron found. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes It is a common practice to determine the iron, calculate it to ferric oxide, and so to estimate the alumina indirectly. A Text-book of Assaying: For the Use of Those Connected with Mines. The difference between this weight and that of the combined oxides gives the ferric oxide and alumina. A Text-book of Assaying: For the Use of Those Connected with Mines. But it is best prepared by adding strong sulphuric acid to ferric hydrate in equivalent proportions. A Text-book of Assaying: For the Use of Those Connected with Mines. The iron found is calculated to ferric oxide by dividing by .7. A Text-book of Assaying: For the Use of Those Connected with Mines. The precipitate may then be ignited and weighed as ferric oxide, as described on page 110. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes Aluminium forms one series of salts which closely resemble those of ferric iron. A Text-book of Assaying: For the Use of Those Connected with Mines. In the absence of ferric salts, phosphates and arsenates count as sulphur. A Text-book of Assaying: For the Use of Those Connected with Mines. This method is applicable in the presence of metallic sulphates other than ferric. A Text-book of Assaying: For the Use of Those Connected with Mines. Iodides are detected by boiling with strong solutions of ferric sulphate or chloride. A Text-book of Assaying: For the Use of Those Connected with Mines. Given the following data, calculate the percentage of iron in a sample of crude ferric chloride weighing 1.000 gram. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes The precipitate is filtered off, washed with hot water, dried, ignited, and weighed as mixed ferric oxide and alumina. A Text-book of Assaying: For the Use of Those Connected with Mines. The ferric arsenate will separate out as a yellowish-white flocculent precipitate. A Text-book of Assaying: For the Use of Those Connected with Mines. In this operation the metals are converted into chlorides by the action of ferric chloride, which gives up a part of its chlorine, and becomes reduced to the ferrous salt. A Text-book of Assaying: For the Use of Those Connected with Mines. Filter, wash with hot water, dry, ignite, and weigh as mixed alumina and ferric oxide. A Text-book of Assaying: For the Use of Those Connected with Mines. For example, 1 gram of crystallised iron sulphate was found to contain on analysis 0.2877 gram of sulphuric oxide; and on igniting another gram, 0.2877 gram of ferric oxide was left. A Text-book of Assaying: For the Use of Those Connected with Mines. To find the alumina, which is best estimated by difference, multiply the iron by 1.428 to get the weight of ferric oxide, and deduct this from the weight of alumina and ferric oxide found. A Text-book of Assaying: For the Use of Those Connected with Mines. Filter off the precipitated ferric hydrate through a quick filter, and wash with hot water. A Text-book of Assaying: For the Use of Those Connected with Mines. If a precipitation occurs, as is the case with ferric salts, &c., the solution is titrated with the precipitate in it. A Text-book of Assaying: For the Use of Those Connected with Mines. The separation is effected by distilling the substance with solution of ferric sulphate, and collecting the vapour in a dilute solution of sulphurous acid or arsenite of soda. A Text-book of Assaying: For the Use of Those Connected with Mines. The substance to be determined is distilled with ferric sulphate, and the iodine is collected in a solution of potassium iodide, in which it readily dissolves. A Text-book of Assaying: For the Use of Those Connected with Mines. The indicator is a saturated solution of iron alum, or a solution of ferric sulphate of equivalent strength made by titrating acid ferrous sulphate with potassium permanganate. A Text-book of Assaying: For the Use of Those Connected with Mines. Make up to 100 c.c. with water, and pass sulphuretted hydrogen to reduce the ferric iron to the ferrous state, then add 20 c.c. of dilute ammonia, and again pass sulphuretted hydrogen. A Text-book of Assaying: For the Use of Those Connected with Mines. This shows that ferric acetate liberates iodine under the conditions of the assay. A Text-book of Assaying: For the Use of Those Connected with Mines. If the iron is not present in more than sufficient quantity to form ferric phosphate with all the phosphorus present, some ferric chloride is added. A Text-book of Assaying: For the Use of Those Connected with Mines. The iron may be removed by adding a slight excess of ammonia to the faintly acid solution, filtering off, and washing the precipitated ferric hydrate with hot water. A Text-book of Assaying: For the Use of Those Connected with Mines. If much iron is present, dissolve the precipitate of ferric hydrate in acid, and reprecipitate with ammonia. A Text-book of Assaying: For the Use of Those Connected with Mines. In a complete examination of a silicate it should be treated with the precipitate containing alumina, ferric oxide, &c. A Text-book of Assaying: For the Use of Those Connected with Mines. The ammonia precipitate contains the whole of the iron as ferric oxide; hence the necessity for calculating the ferrous oxide as ferric, and deducting it. A Text-book of Assaying: For the Use of Those Connected with Mines. Ferrous Oxide.—When a qualitative test shows both ferric and ferrous oxide to be present, the proportion of the ferrous oxide must be separately determined. A Text-book of Assaying: For the Use of Those Connected with Mines. To find the proportion of ferric oxide, the ferrous iron found is multiplied by 1.428, and this is deducted from the weight of ferric oxide obtained by precipitation with ammonia. A Text-book of Assaying: For the Use of Those Connected with Mines. |
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