(Solved): 2. (10 MARKS) The following mechanism shows the radical oxidation of isopropanol in solution at roo ...

2. (10 MARKS) The following mechanism shows the radical oxidation of isopropanol in solution at room temperature. $\begin{array}{c}\text{ Initiator }?2\mathrm{H}?\\ \mathrm{H}?{\mathrm{O}}_2?{\mathrm{HO}}_2{}^{?}\end{array}$ $2{\mathrm{HO}}_2??{\mathrm{H}}_2{\mathrm{O}}_2+{\mathrm{O}}_2$ (a) Directly on the reaction scheme, identify all the steps in the mechanism (e.g., propagation, termination, etc.). (b) Write the overall reaction. (c)Label the scheme with the appropriate rate constants and derive the rate expression for the chain reaction. (d) If this reaction is carried out at high temperature $\left(>100{}^{?}\mathrm{C}\right)$ it involves branching. Suggest the cause/origin of branching in this system.