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.
