Which product is formed when an excess of KCN | vedclass

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(D) When $KCN$ is added to a copper sulfate solution,the following reactions occur:$1$. $2CuSO_4 + 4KCN \rightarrow 2Cu(CN)_2 + 2K_2SO_4$$2$. The unst

Vedclass · Accepted Answer

$K_3[Cu(CN)_4]$

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(D) When $KCN$ is added to a copper sulfate solution,the following reactions occur:$1$. $2CuSO_4 + 4KCN \rightarrow 2Cu(CN)_2 + 2K_2SO_4$$2$. The unstable $Cu(CN)_2$ decomposes: $2Cu(CN)_2 \rightarrow Cu_2(CN)_2 + (CN)_2 \uparrow$$3$. The $Cu_2(CN)_2$ reacts with excess $KCN$ to form a stable complex: $Cu_2(CN)_2 + 6KCN \rightarrow 2K_3[Cu(CN)_4]$Thus,the final product is $K_3[Cu(CN)_4]$.

Which product is formed when an excess of $KCN$ is added to a solution of copper sulfate?

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