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The chemistry of gold e traction skachat

THE CHEMISTRY OF THE EXTRACTION OF GOLD CuCN and CuCN The insoluble gold cyanide compound AuCN precipitates from acidic solutions of aurocyanide ions as follows AuCN H AuCN HCN 152 This reaction takes place readily in strongly acidic solution and slowly in weak acid solutions pH 2 to 3

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