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Copper sulphate solution reacts with KCN to give

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0 votes
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ago in Chemistry by (10.9k points)

Copper sulphate solution reacts with KCN to give

(a) Cu(CN)2

(b) CuCN

(c) K2[Cu(CN)4]

(d) K3[Cu(CN)4]

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1 Answer

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ago by (10.6k points)

Correct option is (d) K3[Cu(CN)4]

Copper sulphate reacts with potassium cyanide giving a white precipitate of cuprous cyanide and cyanogen gas. The cuprous cyanide dissolves in excess of KCN forming potassium cuprocyanide K3[CuCN4].

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