Half equation
What Half equation means in Combined Science GCSE, as defined for AQA.
Definitions of Half equation
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Reference: AQA
A representation of electron loss and gain in which electrons on the right mean oxidation and electrons on the left mean reduction.
Shows one species losing or gaining electrons, with atoms balanced first and then charge balanced by adding electrons.
A representation of the reaction at an electrode that must be balanced for both atoms and total charge.
Represents the reaction at one electrode and includes electrons as e⁻.
Topics that use Half equation
- Atoms, elements and compounds (AQA GCSE)
- Oxidation and reduction in terms of electrons (HT only) (AQA GCSE)
- Representation of reactions at electrodes as half equations (HT only) (AQA GCSE)
- The process of electrolysis (AQA GCSE)
Related terms
Using Half equation in the exam
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