Volume 1

Fownes' manual of chemistry : theoretical and practical / [George Fownes].

  • Fownes, George, 1815-1849.
Date:
1877
Catalogue details

Licence: Public Domain Mark

Credit: Fownes' manual of chemistry : theoretical and practical / [George Fownes]. Source: Wellcome Collection.

    535/586 (page 517)
    chloride, C\2Pt<^'^^^'^S>0^, formed by the action of sulphuric acid on the chloride, crystallises in slender transparent needles. An oxalochloride, Cl2Pt(]<l.2}^^)fi20^, obtained by treating the chloride with ammonium oxalate, is a very soluble crystalline powder. IPt(NH3l)2 9. Diplatinammoniicm Iodide, \ or IPt(NH3l)2 l2(Pt2)(NH3l)^, the only term of this series at present known, is obtained by treating platosammonium iodide with boiling potash, and the resulting yellow powder with hydriodic acid. It is a black amorphous substance, which when again treated with potash and hyckiodic acid yields the compound l2(Pt^)'(NH3l)g, and this by similar treatment may be converted into the still more condensed compound l2(Pt8)'''(NH3l)ig. 10. Diplatosodiammonium Compounds.—The hiidroxide Pt—NgHe—OH I , formed by the action of caustic soda on the Pt—NaHg—OH chloride of platososemidiammonium, is a greyish crystalliae in- soluble powder, which detonates violently when heated. Treated with hydi-ochloric acid, it yields a yellow powder, which is converted by boiling water into the chloride, Pt2(N2HgCl)2. ClaPt—NH3—NH2 11. Diplatinodiammonium Chloride, | Cl2Pt—NH3—NH2' is a yellow amorphous powder formed by the action of nitromuriatic acid on the hydrate of the preceding series. 12. Bipl atino - tetradiammonium Compounds EPt(N2HeR)2 /Pt(N2He.N03)2 I or N8H24Pt2Re. An oxynitrate, 0<^ \ EPt(N2HgR)2 ^Pt(N2H8.N03)2 or N8H24Pt2(N03)40, is produced by boiling platosodiammoniimi nitrate with nitric acid. It is a colourless, crystalline, detonating salt, shghtly soluble in cold water, more soluble in boUing water, insoluble in nitric acid (Gerhardt). A nitratoxychloride, N8H24Pt2(N03)40Cl2, discovered by Eaew^sky, is formed when Magnus's green salt is boiled with a large excess of nitric acid. Eed fumes are then evoli^ed, and the resulting solution deposits the nitrat-oxychloride in small brilliant needles, which deflagrate when heated, giving off water and sal-amnioniac, and leaving metallic platinum. The nitric acid in this salt may be replaced by an equivalent quantity ol carbonic or oxalic acid, yielding the com- pounds, N8H2,Pt2fC03)20Cl2, and N8H24Pt2(C204)20Cl2, both of which are crystallisable, and sparingly soluble. A basic oxalo- mtrate, N8H24Pt2(C204)2(N 03)20, insoluble in wMer, is obtained by adding ammonium oxalate to the oxynitrate.