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Trichlor-hydroxy-platinous Acid, H2PtCl3(OH)

The hydrate of Trichlor-hydroxy-platinous Acid, H2PtCl3(OH), namely, H2PtCl3(OH).H2O, is obtained as a reddish brown deliquescent mass on evaporating an aqueous solution of tetraehlor-platinous acid in vacuo over sulphuric acid and potash.

It dissolves in water, yielding a reddish brown solution with an acid reaction. Heated to 100° C. it loses water and hydrogen chloride, yielding a residue of platinum dichloride.
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