Question

Why does the colour of copper sulphate solution change when an iron is dipped in it? Mention the new colour formed?

Answer 1

This colour change occurs because of the displacement reaction that takes place.Iron being more reactive than copper displaces it from copper sulphate solution and copper is deposited on the iron.Tye solution turns green I.e. Iron sulphate solution

Answer 2

your answer

we know that iron is more reactive than copper and so it displaces it and forms iron sulphate the colour is dirty green ppt

cuso4+fe→ feso4+cu