Chemistry GCSE
Half-equations for reduction
What Half-equations for reduction means in Chemistry GCSE, as defined for AQA.
Definition of Half-equations for reduction
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Reference: AQA
The cathode half-equation for hydrogen production is 2H⁺ + 2e⁻ → H₂, and for a metal less reactive than hydrogen such as copper it is Cu²⁺ + 2e⁻ → Cu.
Topics that use Half-equations for reduction
- Electrolysis of aqueous solutions (AQA GCSE)
Related terms
- Anode
- Electrolysis of aqueous solutions
- Halide preference at the anode
- Hypothesis development and testing
- Identification of electrode products
- Inert electrodes and control variables
- Ion competition in aqueous solution
- Observation and product identification
Using Half-equations for reduction in the exam
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