Excess of KCN is added to an aqueous solution of CuSO 4 ∙5H 2 O. This causes:

Chemistry · NEET · NTA ExamsCoordination Compounds

Excess of KCN is added to an aqueous solution of CuSO4∙5H2O.  This causes:
  1. the formation of Cu(CN)2
  2. the formation of Cu(OH)2
  3. the formation of complex ion [Cu(CN)4]2-
  4. the precipitation of CuCN which dissolves forming the complex ion [Cu(CN)4]3-

Answer

(D) the precipitation of CuCN which dissolves forming the complex ion [Cu(CN) 4 ] 3-

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