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 collected26 exam-style questions on AQA GCSE Chemistry 6.1 Rate of reaction, covering 6.1.1 Calculating rates of reactions, 6.1.2 Factors which affect the rates of chemical reactions, 6.1.3 Collision theory and activation energy, and 6.1.4 Catalysts. Each one has a worked solution and a mark scheme showing where the marks go.