Question

give reason for the following

1. blue solution of copper sulphate changes to Green when a piece of iron is added to this solution

Answer 1

becoz iron is more reactive than copper and it displaces it from its salt solution. As a result copper sulphate changes to green .

Answer 2

Answer:

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.