The following mechanism has been proposed for the conversion of ozone to oxygen

Question

The following mechanism has been proposed for the conversion of ozone to oxygen in the gas phase.

.....step 1.....fast:......O3 <===> O2 + O

.....step 2.....slow:....O3 + O -----> 2 O2

(1) What is the equation for the overall reaction? Use the smallest integer coefficients possible. If a box is not needed, leave it blank.

_______ + ______ -----> ________ + _______

(2) Which species acts as a catalyst? Enter formula. If none, leave box blank: ______

(3) Which species acts as a reaction intermediate? Enter formula. If none, leave box blank: _____

(4) Complete the rate law for the overall reaction that is consistent with this mechanism.
Use the form k[A]m[B]n, where '1' is understood (so don't write it if it's a '1') for m, n etc.

Rate = _______

Explanation / Answer

Given above is the gas phase conversion of ozone to oxygen

(a) From the mechanism

Overall reaction,

2O3 ---> 3O2

(b) Catalys for the reaction :

(c) intermediate for the reaction : O

(d) rate law from the slow step would be,

Rate = 2k[O3]^2

The experimental rate law however from literature is,

Rate = k[O3]^2/[O2]

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