Chapter 20, Problem 111SAE

For the reaction $\text{A+2B}\to \text{C+D}$ , the rate law is rate oif reaction =K[A][B].

 a.  Show that the following mechanism is consistent with the stoichiometry of the overall reaction and with the rate law. $\begin{array}{l}\text{A+B}\to \text{I}\left(\text{slow}\right)\\ \text{I+B}\to \text{C+D}\left(\text{fast}\right)\end{array}$

 b.  Show that the following mechanism is consistent with the stoichiometry of the overall, but not with rate law. $\begin{array}{l}2\text{B}\rightleftharpoons {\text{B}}_{\text{2}}\left(\text{fast}\right)\\ A+B_2\to C+D\left(slow\right)\end{array}$