A coloured reactant is used up in a reaction with a colourless reactant. Four experiments use the same amount of the coloured reactant and an excess of the colourless reactant. The temperature is changed.
| Temperature in ∘C^\circ\mathrm{C}∘C | Time for the mixture to become colourless in s |
|---|---|
| 15 | 190 |
| 25 | 98 |
| 35 | 51 |
| 45 | 27 |
Explain the pattern in the results. Predict, with a reason, how increasing the temperature affects the final amount of product formed.
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.