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Oxidation Reduction Reaction

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XxslbabesxX:
lol ok, another redox question:

My textbook says the following is a redox reaction.

O3 +No--> O2 + NO2

Yet the oxidation number for
O3 is 0 and for O2 it is also 0. The numbers don't chage so how can this be a redox equation?

CJP4:
Ah, but you didn't look at the oxidation number for oxygen in NO2

The oxidation in the reaction side goes from

O3 w/ oxidation # 0 to NO2 oxidation # 2-

So it is reduced by 2.

You have to examine the whole problem :)

mike:
O3 + 2H+ + 2e- ---> O2 + H2O

Borek:
Ozone and hydrogen peroxide reactions are the ones showing that oxidation numbers are only an approximate concept that sometimes fails. Then you have to stick to half reactions.

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