Edexcel IAL Chemistry A2 11.2 Half-life and first-order reactions
Edexcel IAL Chemistry A2 11.2 Half-life and first-order reactions
Mark two consecutive halvings on the graph with working, compare their time intervals and use repeated halving rather than linear subtraction for later amounts.
How this is tested
- Determine two successive half-lives from a graph and show the construction clearly.
- Justify first order from approximately constant half-lives at different concentrations.
- Calculate remaining amount or concentration after a stated number of half-lives.