Chapter 22, Problem 40QP

Interpretation Introduction

Interpretation:

The statements “the addition of aqueous potassium fluoride to copper $\text{(II)}$ sulphate solution gives green precipitates” and “the addition of aqueous potassium chloride gives a bright-green solution” are to be discussed.

Concept introduction:

Copper sulphate in its aqueousform, exists as ${\text{[Cu(H}}_2{\text{O)}}_4{\text{]SO}}_{\text{4}}$ and has a blue colorthat is because of the presence of ${{\text{[Cu(H}}_2{\text{O)}}_4\text{]}}^{2+}$ ions in it. Here, the replacement of a weak field ligand, water, is done by the ${\text{F}}^{-}$ and ${\text{Cl}}^{-}$ ions.