This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1879 Excerpt: ...of a violet-black color, constituting chrome alum. Cr(SO/.K2S04 + 24I-PO Sulphurous acid reduces potassium dichromate in the cold, also yielding chrome alum if sulphuric acid be added. K2Cr207-f 3S02 + IPSO = Cr2(S04)3.K2S04 + H20 The constitution of potassium dichromate is represented by the formula KOOO2 KOCrO2 ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1879 Excerpt: ...of a violet-black color, constituting chrome alum. Cr(SO/.K2S04 + 24I-PO Sulphurous acid reduces potassium dichromate in the cold, also yielding chrome alum if sulphuric acid be added. K2Cr207-f 3S02 + IPSO = Cr2(S04)3.K2S04 + H20 The constitution of potassium dichromate is represented by the formula KOOO2 KOCrO2 COMPOUNDS OF CHROMIUM AND CHLORINE. Several combinations of chromium and chlorine are known. The most important is the violet chloride, Cr2Cl6, corresponding to aluminium chloride and ferric chloride. It is prepared by passing chlorine gas over an intimate and perfectly dry mixture of chromium oxide and charcoal, heated to redness in a porcelain tube; carbon monoxide is disengaged, and chromic chloride sublimes into the cooler portion of the tube in brilliant peach-blossom-colored scales. These crystals are almost insoluble in cold water, and dissolve but slowly in boiling water. Hydrogen reduces them at a red heat, with formation of hydrochloric acid, and a chloride, Cr2Cl4, which crystallizes in white scales (Peligot). Cr2Cl6 + H2 = 2HC1 + Cr2Cl4 If a small quantity of the chloride Cr2C! be added to hot water, holding in suspension the violet chloride, Cr2Cl6, the latter will be instantly dissolved, forming a green solution. Chlorochromic anhydride, Cr02GT, is obtained by heating a previously fused mixture of common salt and potassium dichromate with sulphuric acid; abundant red vapors are disengaged, and condense to a blood-red liquid. This body boils at 116.8. Its density at 25 is 1.920 (Thorpe). On contact with water it decomposes into hydrochloric acid and chromic anhydride. Cr02CP + IPO = CrO3-f 2HC1 BISMUTH. Bi = 210 Extraction.--This metal is found native in a quartzy gangue. It is extracted by simply heating the mineral in cast or sheet i...
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PLEASE NOTE, WE DO NOT SHIP TO DENMARK. New Book. Shipped from UK in 4 to 14 days. Established seller since 2000. Please note we cannot offer an expedited shipping service from the UK.
