At the cathode, [ ] occurs because ions gain electrons.
At the cathode, reduction occurs because ions gain electrons.
Balance the diatomic product first.
For each unit of positive charge, add one electron to the left of a cathode half equation.
The same half-equation rules apply to molten and aqueous electrolytes.
Flashcards for AQA GCSE Chemistry 4.3.5 Representation of reactions at electrodes as half equations (HT only), covering the key terms, definitions and equations you need to recall for Paper 1 and Paper 2. 23 cards, matched to the AQA GCSE Chemistry (8462) specification. Recall questions account for roughly 40% of marks at GCSE Chemistry, so these target the marks you can secure before the paper starts.
