Edexcel IAL Chemistry AS 8.10 Ionic half-equations
Edexcel IAL Chemistry AS 8.10 Ionic half-equations
Balance non-hydrogen atoms first, use H₂O and H⁺ where appropriate, add electrons to balance charge and scale both halves so every electron cancels.
How this is tested
- Balance acidic half-equations with H₂O, H⁺ and electrons in the correct positions.
- Scale and combine half-equations so electrons cancel and atoms and charge remain balanced.
- Write overall ionic equations with correct species, coefficients and state symbols when required.