The cumulative volume of gas collected during a reaction between calcium carbonate and dilute hydrochloric acid was recorded every minute.
| Time / minutes | Cumulative volume of gas / cm3\text{cm}^3cm3 |
|---|---|
| 0 | 0 |
| 1 | 38 |
| 2 | 58 |
| 3 | 70 |
| 4 | 76 |
| 5 | 78 |
| Time interval | 0 to 1 minute | 1 to 2 minutes | 2 to 3 minutes | 3 to 4 minutes | 4 to 5 minutes |
|---|---|---|---|---|---|
| Rate of reaction in cm3 min−1\text{cm}^3\text{ min}^{-1}cm3 min−1 | 38 | 20 | ? | 6 | 2 |
The rate of reaction is calculated using:
rate of reaction=volume of gas produced in 1 minute1 minute \text{rate of reaction} = \frac{\text{volume of gas produced in 1 minute}}{1 \text{ minute}} rate of reaction=1 minutevolume of gas produced in 1 minuteCalculate the rate of reaction for the time interval 2 to 3 minutes.
87 exam-style questions on Edexcel GCSE Chemistry 8.1 Rates of reaction, covering 8.1.1 Measuring and interpreting rates of reaction, 8.1.2 Collision theory and the factors affecting rate, and 8.1.3 Catalysts and enzymes. Each one has a worked solution and a mark scheme showing where the marks go.