The diagram shows a way to study how the rate of reaction between calcium carbonate and dilute hydrochloric acid changes under different conditions. • Put $50\,\text{cm}^3$ of dilute hydrochloric acid into a conical flask. • Pour a measured volume of water into the conical flask. • Warm the conical flask to the stated temperature. • Add $1.0\,\text{g}$ of calcium carbonate to the conical flask. • Record how long the reaction takes to complete. Which volume of water and which temperature result in the shortest time for the reaction to finish?
- Avolume of water added $= 10\,\text{cm}^3$, temperature $= 30\,^{\circ}\text{C}$
- Bvolume of water added $= 10\,\text{cm}^3$, temperature $= 50\,^{\circ}\text{C}$
- Cvolume of water added $= 40\,\text{cm}^3$, temperature $= 30\,^{\circ}\text{C}$
- Dvolume of water added $= 40\,\text{cm}^3$, temperature $= 50\,^{\circ}\text{C}$