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Gold Mining Extract Gold With Nitric Acid

Home > Gold Mining Extract Gold With Nitric Acid

A soft, yellow gold sponge is produced by addition of a small proportion of oxalic acid and a large proportion of potassium carbonate to a concentrated solution, the resulting mixture being then boiled with more oxalic acid. the so-called quot brown gold quot is formed by the action of nitric acid on an alloy of gold and silver containing 20 per cent ...

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