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.



The solutions were combined, gold precipitated


The dry gold powder

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