Introduction to the study of inorganic chemistry / by William Allen Miller.

  • Miller, William Allen, 1817-1870.
Date:
1871
Catalogue details

Licence: Public Domain Mark

Credit: Introduction to the study of inorganic chemistry / by William Allen Miller. Source: Wellcome Collection.

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    Copper. 2G1 adding ammonia to a solution of one of the bismuth salts . the other oxide (BijOj) is Ijrown, and furnishes unstable compounds with bases. A nati\ e stilpliide (BizS-) is occasionally found crystallised in needles, and is formed as a black preci[)itate when solu- tions of tlie metal are treated with sulphuretted lij'drogen. A tric/i/on'de (Bid,) may be obtained as a very fusible, volatile, and delitpiescent substance. It is decomposed by water, and a white oxychloride is formed, while hydrochloric acid is set free. 'I'he Nitrate (Bi3NO,, 5H2O) is the most important solu- ble salt of this metal. It is soluble in excess of acitl, but if largelydiluted with water awhile basic nitrate (Bi^O,, aHNO,) is preci])itated, while an acid salt is formed in the liquid— 3(IJi3.\(),) + 3H,() - 15i/),, allNO, + HiyNO,, 4HNO,. Bismuth salts generally become milky when their solutions are diluted with water, owing to the formation of an in- soluble .salt containing excess of the oxide. 'I’liis precipi- tate is easily dissolved by acetic: acid. .Solutions of the alkalies give a ]jrecipitate of the while hydrated oxide, not soluble in excess of the alkali. .Solutions of the carbonates and ])hosphates give a white precipitate with bismuth salts; but the yellow, with polassic chromate, insoluble in caustic Ijot.ish, is tised to distinguish bismuth from lead, as the lerxd chromate is dis.solved by excess of potash. Before the blow- pipe bismuth salts on charcoal yield a brittle bead of metal, stirrounded by a ring of yellow oxide. CHAPJ'KR XVI. I. COPI’KR. 2. I.K.-UJ. 3. Tll.M.I.IU.M. (60) T. Coi’PKR ; Sy/nh. Cu ; Ato/n. IJ't. — This valuable metal is frecpiently found nati\'e, but its most common ore is the sulphide of copj)er and iron, known as