A student investigated the decomposition of hydrogen peroxide using manganese(IV) oxide as a catalyst. They compared the rate of reaction using fine powder (large surface area) and large pellets (small surface area).
| Time / s | Volume of oxygen gas / cm³ (Line X) | Volume of oxygen gas / cm³ (Line Y) |
|---|---|---|
| 0 | 0 | 0 |
| 10 | 25 | 12 |
| 20 | 42 | 22 |
| 30 | 53 | 31 |
| 40 | 58 | 39 |
| 50 | 60 | 46 |
| 60 | 60 | 52 |
| 70 | 60 | 57 |
| 80 | 60 | 60 |
State how the graph shows that Line Y represents the results for the larger catalyst pellets.
Practise Edexcel GCSE Chemistry Rates of reaction with exam-style questions for Foundation and Higher tier. 166 questions, matched to the Edexcel GCSE Chemistry (1CH0) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.
