Question

The chemical reaction, 2O₃ → 3O₂ proceeds as follows :

Step 1 : O₃  ⇋  O₂ + O ..(fast)

Step 2 : O + O₃  →  2O₂  ...(slow)

The rate law expression should be

(a) r = k^' [O₃][O₂]

(b) r = k^' [O₃]²[O₂]^-1

(c) r = k^' [O₃]²

(c)  unpredictable.

Answer 1

Correct option (b) r = k^' [O₃]²[O₂]^-1

Explanation:

As the slowest step is the rate determining step, hence from step 2