A student carries out an investigation into the rate of reaction between calcium carbonate and hydrochloric acid. The gas volume in the syringe is noted after 1 minute. The experiment is repeated using hydrochloric acid at different concentrations. Which further pieces of apparatus are needed for the investigation?
- A1 and 2 only
- B1 and 3 only
- C2 and 3 only
- D1, 2 and 3