## Example 15.7

$K = \frac{k_{forward}}{k_{reverse}}$

Nha Dang 2I
Posts: 53
Joined: Fri Sep 29, 2017 7:07 am

### Example 15.7

This asks to derive the rate law implied by the mechanism, and confirm that it matches the observed rate law for the rate of decomposition of O3. I understand up to the substitution of [O], but can someone explain how they got the 2?

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Edit: I understand how that they got 2 by multiplying by the common denominator, but are you able to ignore the k2[O3] before that step? Meaning, there wouldn't be the 2?

Justin Yu 3H
Posts: 36
Joined: Fri Sep 29, 2017 7:07 am

### Re: Example 15.7

If you're referring to how they got the net rate of decomposition for O3 after substituting in O, they honestly just added everything on that side together. The term k1[O3], when multiplied by the denominator of the other terms, will cancel the middle term out and double the last term, resulting in a coefficient of two.