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April 19, 2014

Homework Help: Chemistry

Posted by Amy on Tuesday, February 9, 2010 at 6:42pm.

To extract gold from its ore, the ore is treated with sodium cyanide solution in the presence of oxygen and water.
4 Au(s) + 8 NaCN(aq) + O2(g) + 2 H2O(l) -> 4 NaAu(CN)2(aq) + 4 NaOH(aq)

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