Chloroauric Acid to Gold metal

Dissolve 8 g of sodium metabisulfite in 20 mL of water and 5.2 g of chloroauric acid in 4 mL of water, slowly combine the solutions. When the solution is clear and all of the gold metal gas precipitated filter and wash with 100 mL of water, dry in open air.

Source

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The solutions were combined, gold precipitated

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The dry gold powder

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