Question

Give reason for the following:

A characteristic change of colour is seen when a piece of iron is added to copper [II] sulphate solution.

Answer 1

A characteristic change of colour is seen when piece of iron is added to Copper (II) sulphate Solution. This is because iron displaces copper from the copper sulphate solution and forming ferrous sulphate

CuSO4 + Fe → FeSO4 + Cu.

Hence, Blue colour of the solution in changes to pale green and there is a reddish brown deposits on copper.