Class 12 Chemistry - Chapter Coordination Compounds NCERT Solutions | Aqueous copper sulphate solution (blue i

Welcome to the NCERT Solutions for Class 12th Chemistry - Chapter Coordination Compounds. This page offers a step-by-step solution to the specific question from Exercise 2, Question 13: aqueous copper sulphate solution blue in colour....
Question 13

Aqueous copper sulphate solution (blue in colour) gives:

(i) a green precipitate with aqueous potassium fluoride, and

(ii) a bright green solution with aqueous potassium chloride

Explain these experimental results.

Answer

Aqueous CuSO4 exists as [Cu(H2O)4]SO4. It is blue in colour due to the presence of

[Cu[H2O)4]2+ ions.

 

(i) When KF is added:

(ii) When KCl is added:

In both these cases, the weak field ligand water is replaced by the F - and Cl - ions.

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