In experiment P, a fixed mass of a solid reactant is used up in 20 s. A student repeats the reaction under four different conditions, using the same mass of the solid each time.
| Experiment | Time for the solid to be used up in s |
|---|---|
| Q | 40 |
| R | 80 |
| S | 5 |
| T | 25 |
Using 1/t 1/t\,1/t as a measure of relative rate, which experiment has a rate that is one quarter of the rate in experiment P?
Experiment Q
Experiment S
Experiment T
Experiment R
122 exam-style questions on Edexcel GCSE Chemistry 8.1 Rates of reaction, covering 8.1.1 Measuring and interpreting rates of reaction, 8.1.2 Collision theory and the factors affecting rate, and 8.1.3 Catalysts and enzymes. Each one has a worked solution and a mark scheme showing where the marks go.