Silver sulphide dissolves in a solution of so | vedclass

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Question

(A) The dissolution of silver sulphide $(Ag_2S)$ in a sodium cyanide $(NaCN)$ solution is a key step in the extraction of silver (MacArthur-Forrest pr

Vedclass · Accepted Answer

$Na[Ag(CN)_2]$

Vedclass · Answer

(A) The dissolution of silver sulphide $(Ag_2S)$ in a sodium cyanide $(NaCN)$ solution is a key step in the extraction of silver (MacArthur-Forrest process). The chemical reaction is: $Ag_2S + 4NaCN \rightleftharpoons 2Na[Ag(CN)_2] + Na_2S$. Thus,the complex formed is sodium dicyanoargentate$(I)$,which is $Na[Ag(CN)_2]$.

Silver sulphide dissolves in a solution of sodium cyanide to form the complex:

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