A student investigated the effect of pH on the activity of amylase, a carbohydrase enzyme.
The table below shows the time taken for amylase to completely digest 1.8 g1.8\text{ g}1.8 g of starch at different pH levels.
| pH | Time taken to digest the starch in minutes |
|---|---|
| 5.2 | 30 |
| 6.2 | 12 |
| 7.2 | 4 |
| 8.2 | 25 |
At pH 7.2, the amylase digested 1.8 g1.8\text{ g}1.8 g of starch at a rate of 0.45 g0.45\text{ g}0.45 g per minute.
Calculate the rate of starch digestion at pH 8.2.
Give your answer to one significant figure.
