NEETChemistryCoordination Compounds
Why does aqueous copper sulphate solution (blue in colour) exhibit the following experimental results that is,It forms a green precipitate with aqueous potassium fluoride and a bright green solution with aqueous potassium chloride?
Options
- ACopper sulphate undergoes a redox reaction with fluoride ions, leading to the green precipitate and bright gre
- BIt reacts with KF to form green-coloured [CuF 4 ] 2− and reacts with KCL to form bright green-coloured [CuCl 4
- CThe green colour is due to the interaction of copper sulphate with fluoride and chloride ions.
- DCopper sulphate reacts differently with fluoride and chloride ions due to differences in ligand strength.
Correct answer
B. It reacts with KF to form green-coloured [CuF 4 ] 2− and reacts with KCL to form bright green-coloured [CuCl 4
Step-by-step solution
Correct Option is : (B) It reacts with KF to form green-coloured [CuF 4 ] 2− and reacts with KCL to form bright green-coloured [CuCl 4 ] 2− In both these cases, the weak field ligand water is replaced by the F − and Cl − ions.