A student investigated the rate of decomposition of hydrogen peroxide using a manganese(IV) oxide catalyst. They measured the volume of oxygen gas collected in a gas syringe every minute for 8 minutes.
| Time in minutes | Volume of oxygen in cm3\text{cm}^3cm3 |
|---|---|
| 0 | 0 |
| 1 | 32 |
| 2 | 54 |
| 3 | 68 |
| 4 | 76 |
| 5 | 80 |
| 6 | 80 |
| 7 | 80 |
| 8 | 80 |
State why the student could have stopped taking measurements at 6 minutes.
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.
