Equal masses of calcium trioxocarbonate(iv) were added to dilute hydrochloric acid at the temperature specified. Under which of the following conditions would the reaction be slowest?

Equal masses of calcium trioxocarbonate(iv) were added to dilute hydrochloric acid at the temperature specified. Under which of the following conditions would the reaction be slowest?

A. Calcium trioxocarbonate (IV) chips a 20°C
B. CalcIum trioxocarbonate (IV) chips at 40°C
C. Calcium trioxocarbonate (IV) powder at 20’C
D. Calcium trioxocarbonate (IV) powder at 40’C

Correct Answer:

Option A – Calcium trioxocarbonate (IV) chips a 20°C

Explanation

– Increasing the surface area of a reactant increases the frequency of collisions and increases the reaction rate.

– Chips have a lower surface area compared to powder, so it accounts for the slowest