hw:14.107 Relation of K and H+/OH-


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Yinhan_Liu_1D
Posts: 51
Joined: Sat Sep 24, 2016 3:00 am

hw:14.107 Relation of K and H+/OH-

Postby Yinhan_Liu_1D » Thu Feb 09, 2017 4:02 pm

I don't quite understand why we use K=[H+]/[OH-]

Are we using H2O->H+ + OH-? Then why aren't they both in the [product] part?

Or there is another RXN?

Aneesh_Gowri 1H
Posts: 21
Joined: Wed Sep 21, 2016 2:59 pm

Re: hw:14.107 Relation of K and H+/OH-

Postby Aneesh_Gowri 1H » Thu Feb 09, 2017 5:41 pm

In some galvanic cells, the reaction H2O -> H + OH is part of the oxidation/reduction reaction. So the H+ is part of the reduction reaction at the cathode and the OH- is part of the oxidation reaction at the anode.

At the end, after you solve the problem, you'll end up with H + OH -> H2O as the final reaction


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