Question

Iron nail become brown and then turn blue when kept in the copper sulphate solution why

Answer 1

Answer:

Iron Nail becomes brown and turns blue copper sulphate solution green.

Explanation:

This is because iron is above copper in the reactivity series of elements. When the iron Nail is kept in CuSO4 Solution, it displaces copper and takes its place with the sulphate ion as follows :-

Fe + CuSO4 ------> FeSO4 + Cu

Since ferrous sulphate solution is green in nature, the solution turns green and reddish brown deposits of copper are found in the iron Nail.

Hope this answers your question!

Answer 2

Answer:

becoz of formation of iron sulphate ( feSo4 )....