📘 chemical kinetics

1. **Problem Statement:** We have three chemical species $A_1$, $A_2$, and $A_3$ undergoing the following reactions with first-order kinetics:

1. The problem is to explain why there is a factor of 2 in front of the term $k_c[OF]^2$ in equation (1) and why the rate term for $k_a$ is $k_a[F_2O]^2$ without an extra factor. 2

1. **State the problem:** We are given a reaction mechanism with four elementary steps and asked to use the steady-state approximation (SSA) for intermediates OF and F to derive th