What is the final product formed when copper | vedclass

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Question

(A) The reaction proceeds in three steps:$(i)$ $CuSO_4 + 2 KCN \rightarrow K_2SO_4 + Cu(CN)_2$ (Precipitation of cupric cyanide)(ii) $2 Cu(CN)_2 \righ

Vedclass · Accepted Answer

$K_3[Cu(CN)_4]$

Vedclass · Answer

(A) The reaction proceeds in three steps:$(i)$ $CuSO_4 + 2 KCN \rightarrow K_2SO_4 + Cu(CN)_2$ (Precipitation of cupric cyanide)(ii) $2 Cu(CN)_2 \rightarrow 2 CuCN + (CN)_2$ (Decomposition of unstable cupric cyanide)(iii) $3 KCN + CuCN \rightarrow K_3[Cu(CN)_4]$ (Formation of the stable complex potassium tetracyanocuprate$(I)$)Thus,the final product is $K_3[Cu(CN)_4]$.

What is the final product formed when copper sulphate solution reacts with excess $KCN$?

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