Keep two carbon rods immersed in copper sulphate solution. Then pass electricity through the solution.
i) At which electrode does colour change occur-anode or cathode?
ii) Is there any change in the blue colour of the copper sulphate solution?
iii) Write down the chemical equations for the changes occurring here?

Explanation

i) Cathode
ii) Yes, the blue colour of copper sulphate solution decreases. This is due to the decrease in number of copper jons in the solution.
iii) While conducting electricity through copper sulphate solution,
`CuSO_4 rarr Cu^2+ + SO^2__4`