A student investigates a reaction in which a yellow colour appears. The time taken for the mixture to match the same reference colour is measured.
The results for two experiments are shown in the table.
| Experiment | Time in repeat 1 / s | Time in repeat 2 / s | Time in repeat 3 / s | Time in repeat 4 / s |
|---|---|---|---|---|
| A | 72 | 70 | 71 | 90 |
| B | 41 | 40 | 55 | 39 |
For each experiment, the student ignores the anomalous result and calculates the mean time.
The relative rate is calculated using relative rate=1mean time\displaystyle \mathrm{relative\ rate} = \frac{1}{\mathrm{mean\ time}}relative rate=mean time1.
Calculate the factor by which the relative rate in experiment B is greater than the relative rate in experiment A.
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.