Chemistry

Problem

The reaction

2A+B\rightarrow \text{products}

is found experimentally to follow the rate law

\text{rate} = k[A]^{2}

. Which proposed mechanism is consistent with these data? a) Step 1 (slow):

A+B\rightarrow C

Step 2 (fast):

C+A\rightarrow \text{products}

b) Step 1 (slow):

A+A\rightarrow D

Step 2 (fast):

D+B\rightarrow \text{products}

c) Step 1 (fast eq.):

A+B\;\rightleftharpoons\; C

Step 2 (slow):

C+A\rightarrow \text{products}

d) Single elementary step (slow):

2\,A+B\rightarrow \text{products}