Explain the required practical: Electrolysis of aqueous solutions - Copper (II) Chloride

1) Pour 50cm3 of copper (II) chloride solution into beaker 2) Place plastic petri dish (with 2 holes) over beaker and place each graphite rod into each hole - electrodes (carbon graphite is unreactive so the electrodes are inert - wont react). Make sure the electrodes don't touch each other - else it'll cause a short circuit 3) Attach crocodile clips to the rods and connect the rods to the terminals of low-voltage power supply, select 4V on the power supply and switch it on 4) The (-) cathode will become coated in copper, copper's less reactive than hydrogen and will therefore be discharged at the cathode 5) At the anode, bubbles of gas will also be produced and you may smell chlorine in the air, chlorine is a halide ion and will therefore be discharged at the anode 6) Placing a damp blue litmus paper near the anode and it becomes bleached proves chlorine is present