In the rate-limiting approximation for a two-step reaction, the overall rate of the reaction is always equal to the rate of the .................. step in the reaction mechanism.

In the rate-limiting approximation for a two-step reaction, the overall rate of the reaction is always equal to the rate of the slowest step in the reaction mechanism.

$$\begin{gathered} \mathrm{A}\to \mathrm{C} \\ \mathrm{A}\to \mathrm{B} \mathrm{intermidiate} \\ \mathrm{B}\to \mathrm{C} \end{gathered}$$