A Disadvantage to Leaching Gold with Aqueous Solutions of Cyanide

question 100

Multiple Choice

A disadvantage to leaching gold with aqueous solutions of cyanide ion is that

• A) it is a complicated process requiring more than two dozen separate steps.
• B) it requires the use of ores with a very high concentration of gold.
• C) sodium cyanide is very expensive.
• D) the method is a potential environmental hazard.
• E) the method does not produce gold of high enough purity.

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