A student investigated the effect of pH on the rate of hydrogen peroxide breakdown by catalase. Their results are shown in the table below.
| pH | Time taken to collect 20 cm3 of oxygen (seconds) |
|---|---|
| 3.0 | 150 |
| 4.0 | 85 |
| 5.0 | 40 |
| 6.0 | 15 |
| 7.0 | 55 |
| 8.0 | 110 |
| 9.0 | 210 |
Describe the trends shown in this data.
