Half reaction of O3 to O2

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Kevin Tabibian 1A
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Joined: Fri Sep 29, 2017 7:06 am

Half reaction of O3 to O2

Postby Kevin Tabibian 1A » Mon Feb 19, 2018 3:40 pm

In question 14.5 the balanced half reaction for O3 (g) --> O2 (g) is H2O (l) + O3 (g) + 2e- --> O2 (g) + 2OH- (aq) . How are we supposed to know that it takes 2 elections to form O2. Where is the number 2 coming from?

AtreyiMitra2L
Posts: 169
Joined: Fri Sep 29, 2017 7:03 am
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Re: Half reaction of O3 to O2

Postby AtreyiMitra2L » Mon Feb 19, 2018 3:41 pm

On the right, you see two hyrdroxide ions. This means that there is -2 on that side. To balance the equation, you need negative 2 on the other side. This is why we have 2 electrons.


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