題組內容

27. The gas-phase reaction between chlorine and chloroform is represented by the equation: 66189f3b30868.jpg

The rate law determined from experimental data is given as: R = k [Cl2] 1/2[CHCl3] Below is a plausible mechanism proposed for this reaction:

  66189f597c427.jpg

Please answer the following questions

(1) Which step in the mechanism is the rate-determining step? (1 point)