Olympiad workbookNSECCoordination Compounds
Cyanide ion is a very good complexing agent and also functions as a reducing agent. Hence many cyanide complexes of metals are known. Addition of an aqueous solution of KCN to a solution of copper sulphate yields a white precipitate which is soluble in excess of aqueous KCN to form the complex:
Options
- A[ Cu ( CN )₄ ]¹⁻
- B[ Cu ( CN )₄ ]²⁻
- C[ Cu ( CN )₄ ]³⁻
- D[ Cu ( CN )₄ ]⁴⁻
Correct answer
C. [ Cu ( CN )₄ ]³⁻
Step-by-step solution
No Solution