Question

Mention with reason the colour changes observed when:

a piece of zinc is dropped in copper sulphate solution.

Answer 1

Because zinc is more reactive than copper, it separates copper from its compound to create a new product. This reaction is one of displacement.

\[\ce{\underset{\text{(Copper sulphate)}}{Zn(s) + CuSO_{4(aq)}} -> \underset{\text{(Zinc sulphate)}}{ZnSO_{4(aq)}} + {Cu{(s)}}}\]