Solutions X and Y react to form a coloured product. A student changes the concentration of solution X and records the time taken for the mixture to reach the same shade of colour. All other conditions are kept the same.
| Concentration of solution X in g dm−3\mathrm{g\,dm^{-3}}gdm−3 | Time to reach the same shade in s\mathrm{s}s |
|---|---|
| 8.0 | 90 |
| 12.0 | 60 |
| 16.0 | 45 |
| 20.0 | 36 |
Calculate the time expected for the mixture to reach the same shade when the concentration of solution X is 24.0 g dm−324.0\,\mathrm{g\,dm^{-3}}24.0gdm−3.
Use the pattern in the results and show your working.
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.