GCSE Chemistry Revision "Required Practical 3: Electrolysis"

Experiment Setup: Copper(II) Chloride00:00:08

Introduction to the required practical and setup for electrolysis of copper(II) chloride solution using inert graphite electrodes and a low-voltage power supply.

Results for Copper(II) Chloride00:01:30

Observations at the cathode (copper coating) and anode (chlorine gas production), verified by bleaching blue litmus paper.

Experiment Setup: Sodium Chloride00:02:34

Repeating the electrolysis process using sodium chloride solution instead of copper(II) chloride.

Results for Sodium Chloride00:02:51

Observations show chlorine gas at the anode and hydrogen gas at the cathode because sodium is more reactive than hydrogen.