Question

A characteristic change of colour is seen when a piece of iron is added to copper (2) sulphate solution

Answer 1

Answer:

blue colour copper sulphate changes to light gren iron sulphate as iron displaces copper.

Explanation:

CuS04+Fe=FeS04+Cu

Answer 2

Answer:

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.