For the overall reaction 2A + B → C
Which of the following mechanisms is/are consistent with a rate equation of rate = k[A]²[B]?

Question

For the overall reaction 2A + B → C Which of the following mechanisms is/are consistent with a rate equation of rate = k[A]²[B]?

Quizplus · Accepted Answer

The rate equation suggests that the reaction is second order with respect to A (^{2) and zero order with respect to B (}). Option A involves a fast step with I as an intermediate, which is consistent with the rate equation. Option D also has a fast step but involves a different intermediate. Therefore, options A and D are both possible mechanisms. Hence, the correct answer is choice E, which includes both options A and D.

For the Overall Reaction 2A + B → C