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Nitric oxide reacts with oxygen to produ...

Nitric oxide reacts with oxygen to produce nitrogen dioxide.
` 2NO (g) +O_(2) (g) to 2NO_(2) (g)`
What is the predicted rate law and order if the mechanism is:
`(i) NO +O_(2) overset(K) hArr NO_(3) ` ( fast)
` (ii ) NO_(3) +NO overset(K_1) hArr NO_(2) +NO_2` ( slow)

Text Solution

Verified by Experts

From the slow step,
Rate `=k_(1)[NO_(3)][NO]`…………`(i)`
From fast step
Equlibrium constant `(K)=([NO_(3)])/([NO][O_(2)])`…………`(ii)`
Substituting the value of `[NO_(3)]` from equation `(ii)` into equation `(i)`, we get
Rate `=k.[NO]^(2)[O_(2)]`
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