A solid sample of calcium carbonate is placed into $100\ \text{cm}^3$ of dilute hydrochloric acid, and the reaction rate is measured. A second $100\ \text{cm}^3$ portion of the acid is then mixed with $100\ \text{cm}^3$ of distilled water, and the experiment is repeated under identical conditions. Why does adding water lower the rate of the reaction?
- A1, 2 and 3
- B1 and 2 only
- C2 and 3 only
- D1 only