Edexcel IAL Chemistry A2 16.19 hydrogen-oxygen fuel-cell electrode reactions
Edexcel IAL Chemistry A2 16.19 hydrogen-oxygen fuel-cell electrode reactions
Decide which electrode is oxidation or reduction, then match the acidic or alkaline half-equation and remember electrons travel through the external circuit.
How this is tested
- Choose alkaline fuel-cell half-equations such as H2 plus OH- forming water and electrons.
- Identify electron-flow direction from the negative electrode through the external circuit.
- Write or recognise the overall hydrogen-oxygen reaction as hydrogen plus oxygen forming water.