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Atomistry » Platinum » Chemical Properties » Pentachlor-hydroxy-platinic Acid | ||
Atomistry » Platinum » Chemical Properties » Pentachlor-hydroxy-platinic Acid » |
Pentachlor-hydroxy-platinic Acid, H2PtCl5(OH)
The nionohydrate of Pentachlor-hydroxy-platinic Acid, H2PtCl5(OH), namely, H2PtCl5(OH).H2O, is obtained as a deliquescent residue on keeping crystals of hexachlor-platinic acid in a vacuum over caustic potash at 100° C. for three days:
H2PtCl6.6H2O = H2PtCl5(OH).H2O + HCl + 4H2O. It readily dissolves in water, yielding a yellow solution with an acid reaction, sufficiently powerful to decompose carbonates. With ammonia no precipitate is obtained, which property serves to distinguish this acid from hexachlor-platinic acid. With ammonium chloride or potassium chloride the corresponding hexaehlor-platinate is produced. Titration with alkali, using phenolphthalein as indicator, shows that the acid is dibasic, and several salts have been prepared. |
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