Platinate , hexachloro-, disodium

A vacuum pump, with an intervening trap, is connected to the flask, and the hydrochloric acid solution is evaporated to dryness by placing the flask in a pan of hot water. The product is a crude form of hydrated hexachloroplatinic(IY) acid strong heating must be avoided to prevent decomposition of the solid acid. The solid acid is redissolved in a minimal volume (approximately 10 ml.) of distilled water, and disodium hexachloro-platinate(IV) is precipitated by adding a threefold excess (8.0 g.) of solid sodium chloride to the solution and cooling the mixture in an ice-water bath. J... 

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