Question

01. Why does the colour of copper sulphate solution change when an iron nail is dipped in it?
Write chemical equation for the reaction involved.​

Answer 1

The colour of copper sulphate solution changes when an iron nail is dipped in it because iron is more reactive than copper.
A substance which releases ions are called acids.
When an "iron nail" dips into the solution of "copper sulphate" than iron, the copper sulphate displaces copper because "iron" is "more reactive" than "copper".
Hence the colour of the solution for copper sulphate changes.
The chemical reaction is as follows.

CuSO4 (aq) + Fe (s) gives FeSO4 (aq) + Cu (s)

Answer 2

Answer:

when iron nail is dipped in copper sulphate it's cor changes because a displacement reaction occurs between iron and copper sulphate.

Fe + Cu S O4 = Fe S O4 + Cu