All AQA GCSE Chemistry Practicals

Practical 3: Electrolyis (Topic 4)

• Equipment: 0.5 mol/dm³ solution, beaker, lid with holes, electrodes, 4V power supply, crocodile clips
• Add copper chloride solution to beaker
• Add a lid with holes to put the carbon electrodes through
• Attach crocodile leads to the electrode and connect to a low voltage power supply (4V)
• Use forceps to hold blue litmus paper by the positive electrode (it bleaches)
• Leave for a few minutes then turn power supply off
• Observe negative electrode
• Safety: wear goggles, open windows (chlorine gas)