Aiming for Grade 4 LOs:

• Define electrolysis.
• Write a word equation to describe the electrolysis of a molten ionic compound.

Aiming for Grade 6 LOs:

• Describe electrolysis in terms of movement of ions.
• Write a balanced symbol equation including state symbols for the overall electrolysis of a molten ionic compound.
• Predict the products at each electrode for the electrolysis of a molten ionic compound.

Aiming for Grade 8 LOs:

• Explain why electrolysis can only occur when an ionic compound is molten or in aqueous solution.
• Describe electrolysis with half equations at the electrodes.
• Explain the classification of the reactions at each electrode as oxidation or reduction.