Coordination CompoundHard

Question

CuSO4 and KCN react to produce :

Options

A.CuCN2
B.CuCn
C.K3[Cu(CN)4]
D.K4[Cu(CN)6]

Solution

CuSO4 and KCN reacts to form complex.CuSO4 + 2KCN → Cu(CN)2 + KSO4
Cu(CN)2 → 2CuCN + (CN)2
2CuCN + 6KCN → K3[Cu(CN)4]

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