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|Section2= |Section3= |Section7= |Section8= }} Chloroplatinic acid or hexachloroplatinic acid are inorganic compound with the formula ()2()(H2O)x. A red solid, it is an important commercial source of platinum, usually as an aqueous solution. Although often written in shorthand as H2PtCl6, it is the hydronium (H3O+) salt of the hexachloroplatinate anion (PtCl62-).〔〔The related palladium compound, ()2(), is extremely unstable and has not been isolated in pure form.〕 The compound is also available as the hexahydrate. ==Production== Chloroplatinic acid is produced by dissolving platinum metal sponge in aqua regia. Brownish red crystals can be isolated by evaporating this solution to a syrup. : Pt + 4 HNO3 + 6 HCl → "H2PtCl6" + 4 NO2 + 4 H2O A related procedure gives the hexahydrate, H2PtCl6(H2O)6.〔H. Grube "Hexachloroplatinic (IV) Acid" in Handbook of Preparative Inorganic Chemistry, 2nd Ed. Edited by G. Brauer, Academic Press, 1963, NY. Vol. 2. p. 1569.〕 Alternative methods have been heavily investigated, but the older literature can be unreliable. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「chloroplatinic acid」の詳細全文を読む スポンサード リンク
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