Several reactions of calcium carbonate with dilute hydrochloric acid are carried out at the same temperature.

Several reactions of calcium carbonate with dilute hydrochloric acid are carried out at the same temperature.

$CaCO_3 (s) + 2HCl (aq) → CaCl_2 (aq) + H_2O (l) + CO_2 (g)$

Which reaction has the greatest rate?

$$\begin{array}{|c|c|c|} \hline \text{Answer}&\text { Concentration of } \mathrm{HCl}(\mathrm{aq}) & \begin{array}{c} \text { Surface area of same mass } \\ \text { of } \mathrm{CaCO}_3(\mathbf{s}) \end{array} \\ \hline A&\text { higher } & \text { larger } \\ \hline B&\text { lower } & \text { smaller } \\ \hline C&\text { lower } & \text { larger } \\ \hline D&\text { higher } & \text { smaller } \\ \hline \end{array}$$