Question

Why does the iron nail become brownish in colour and the blue colour of copper sulphate solution fade

Answer 1

Answer:

blue into light greeen

Explanation:

When an iron nail immersed in the solution of copper sulphate than iron displaces copper from the solution of copper sulphate because iron is more reactive than copper. Therefore copper sulphate solution colour changes from blue to pale green.

Answer 2

Answer:

Because of the displacement reaction carried out in this process

Explanation:

As we know iron is more reactive than copper, so, copper sulphate is displaced by iron sulphate and copper gets coated on the iron nail.

Fe + CuCo3 - > FeCo3 + Cu