Question

the colour of freshly prepared solution of copper sulphate gradually changes when an iron nails is dipped in it .name the reaction that take place and give a balance chemical equation mentioning the state of the reactants and the products

Answer 1

displacement reaction,

CuSO4(aq)+Fe(s)--------->FeSO4(aq) + Cu(ppt.)

Answer 2

When an iron nail is dipped into the solution of Copper Sulphate then the Iron will displace the Copper from the solution of Copper Sulphate because Iron is far more reactive than Copper. This implies Copper Sulphate solution colour changes.

1. This is an example of a Displacement reaction.
2. $CuSO_4 (aq) + Fe (s)$→$FeSO_4 (aq) + Cu (s)$