Introduction to Reaction Mechanisms

AP Chemistry· difficulty 3/5

A two-step mechanism with the first step slow.

Step 1: 2A -> B (slow) Step 2: B + C -> D (fast) Overall: 2A + C -> D

What is the predicted rate law?

  • A

    rate = k[A][C]

  • B

    rate = k[A]^2

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  • C

    rate = k[A]^2[C]

  • D

    rate = k[B][C]

Explanation

Rate-determining step is step 1 (slow): rate = k[A]^2.

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