A company investigates using fermentation to produce ethanol for use as a fuel.
Each trial used the same volume and concentration of glucose solution for 48 hours.
| Trial | Yeast added | Temperature in °C | Air continuously supplied | Ethanol concentration after 48 hours in g/dm³ |
|---|---|---|---|---|
| A | No | 30 | No | 0 |
| B | Yes | 20 | No | 16 |
| C | Yes | 30 | No | 40 |
| D | Yes | 30 | Yes | 3 |
Use the results to explain the conditions the company should use to produce ethanol by fermentation.
The company considers increasing the temperature from 30 °C to 60 °C.
Predict how this change would affect the amount of ethanol produced. Explain your answer.
97 exam-style questions on AQA GCSE Chemistry 7.2 Reactions of alkenes and alcohols, covering 7.2.1 Structure and formulae of alkenes, 7.2.2 Reactions of alkenes, 7.2.3 Alcohols, 7.2.4a Carboxylic acids, and 7.2.4b Carboxylic acids as weak acids. Each one has a worked solution and a mark scheme showing where the marks go.