TRIPLE: 1.54 describe experiments to investigate electrolysis, using inert electrodes, of aqueous solutions such as sodium chloride, copper(II) sulfate and dilute sulfuric acid and predict the products

Electrolysis of aqueous sodium chloride using inert electrodes

Suitable materials for the electrodes are platinum or graphie

Particles present in solution: 

• Sodium ions
• Chloride ions
• Water molecules 

Hydrogen gas is produced as water molecules gain electrons at the cathode.

Chlorine gas is produced as chloride ions lose electrons.