The cyanide complex of silver formed in the s | vedclass

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Question

(A) The Mac-Arthur Forrest process is used for the extraction of silver and gold from their ores. In the case of silver,the finely powdered ore is tre

Vedclass · Accepted Answer

$[Ag(CN)_2]^-$

Vedclass · Answer

(A) The Mac-Arthur Forrest process is used for the extraction of silver and gold from their ores. In the case of silver,the finely powdered ore is treated with a dilute solution of sodium cyanide $(NaCN)$ or potassium cyanide $(KCN)$ in the presence of air. The chemical reaction is: $4Ag + 8CN^- + 2H_2O + O_2 \rightarrow 4[Ag(CN)_2]^- + 4OH^-$. The silver is dissolved in the form of the soluble dicyanoargentate$(I)$ complex,$[Ag(CN)_2]^-$. Therefore,the correct option is $A$.

The cyanide complex of silver formed in the silver extraction in Mac-Arthur's Forrest cyanide process is

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