Question

Give reason for the following:
The blue colour of aqueous copper sulphate fades when it is electrolysed using platinum electrodes.

Answer 1

The blue colour of copper ions fades due to a decrease in $C{u}^{+2}$ ions and finally, the solution becomes colourless as soon as $C{u}^{+2}$ ions are finished. So, the blue colour of Copper sulphate fades away when electrolyzed using platinum electrodes.