A student investigated the rate of the reaction between calcium carbonate and hydrochloric acid. Carbon dioxide gas is produced during this reaction. The student calculated the rate of the reaction for four trials. The table below shows the results of the calculations.
| Trial | Rate of reaction in cm3/s\text{cm}^3/\text{s}cm3/s |
|---|---|
| Trial 1 | 1.46 |
| Trial 2 | 1.52 |
| Trial 3 | 1.02 |
| Trial 4 | 1.52 |
Determine the mean time taken to collect 30 cm330\text{ cm}^330 cm3 of gas. Do not include any anomalous results in your calculation.
Use the equation: mean rate of reaction=volume of gas collectedmean time taken\text{mean rate of reaction} = \frac{\text{volume of gas collected}}{\text{mean time taken}}mean rate of reaction=mean time takenvolume of gas collected
Practise AQA GCSE Chemistry Rate of reaction with exam-style questions for Foundation and Higher tier. 46 questions covering Calculating rates of reactions, Factors which affect the rates of chemical reactions, Collision theory and activation energy, and Catalysts, matched to the AQA GCSE Chemistry (8462) 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.