Chemistry study notes
Redox Chemistry
Track electrons through reactions, electrolysis and electricity-producing cells.
O-Level 5086 / 5088 (2026) / SEC G3 K326 / K328 (2027)
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7. Redox Chemistry (5086 / 5088 / K326 / K328). Use the outcome map to find the explanation for a particular syllabus requirement.
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7(a) Define oxygen/hydrogen redox
- Oxygen gain/loss
- Hydrogen loss/gain
7(b) Define electron/oxidation-state redox
- Electron loss/gain
- Oxidation-state increase/decrease
7(c) Test redox agents
- KI to brown iodine
- Acidified KMnO4 purple to colourless