A technician investigates the addition of hydrogen to unsaturated oil.
Experiments X and Y use the same mass of oil and the same initial volume of hydrogen at the same temperature and pressure. Nickel is added to one experiment.
| time / min | volume of hydrogen used up in experiment X / cm3\mathrm{cm^3}cm3 | volume of hydrogen used up in experiment Y / cm3\mathrm{cm^3}cm3 |
|---|---|---|
| 0 | 0 | 0 |
| 3 | 30 | 11 |
| 6 | 48 | 22 |
| 9 | 48 | 32 |
State which experiment contained nickel. Give one piece of evidence from the table.
Explain, in terms of activation energy and collisions, why nickel increases the rate of this reaction.
Experiment Y is continued until the reaction is complete.
State the final volume of hydrogen used up. Explain your answer.
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.