A student investigated the rate of reaction between calcium carbonate chips and dilute hydrochloric acid. They measured the cumulative volume of carbon dioxide gas collected at the end of every minute.
Table 1 shows the cumulative volume of gas collected over 5 minutes.
Table 1
| Time / minutes | Cumulative volume of carbon dioxide gas produced / cm3\text{cm}^3cm3 |
|---|---|
| 0 | 0 |
| 1 | 52 |
| 2 | 81 |
| 3 | 101 |
| 4 | 113 |
| 5 | 119 |
Table 2 shows the rates of reaction calculated from these results.
rate of reaction=volume of gas produced in the 1-minute interval1 minute \text{rate of reaction} = \frac{\text{volume of gas produced in the 1-minute interval}}{1 \text{ minute}} rate of reaction=1 minutevolume of gas produced in the 1-minute intervalTable 2
| Time interval | Rate of reaction / cm3 min−1\text{cm}^3\text{ min}^{-1}cm3 min−1 |
|---|---|
| 0 to 1 minute | 52 |
| 1 to 2 minutes | 29 |
| 2 to 3 minutes | (missing) |
| 3 to 4 minutes | 12 |
| 4 to 5 minutes | 6 |
Calculate the rate of reaction for the time interval 2 to 3 minutes.
Practise Edexcel GCSE Chemistry Rates of reaction with exam-style questions for Foundation and Higher tier. 166 questions, matched to the Edexcel GCSE Chemistry (1CH0) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.
