The reaction 2A $\rightarrow$ B is second order with respect to A. If the concentration of A is decreased by half, what will happen to the rate of the reaction?

Question

The reaction 2A  $\rightarrow$  B is second order with respect to A. If the concentration of A is decreased by half, what will happen to the rate of the reaction?

Quizplus · Accepted Answer

Since the reaction is second order with respect to A, the rate is proportional to the square of the concentration of A. Therefore, if the concentration of A is decreased by half, the rate of the reaction will decrease by a factor of 4 ($(\frac{1}{2})^2 = \frac{1}{4}$).

The Reaction 2A →\rightarrow→ B Is Second Order with Respect to A

The Reaction 2A $\rightarrow$ B Is Second Order with Respect to A