reverse half reaction

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Abigail Menchaca_1H
Posts: 104
Joined: Sat Sep 07, 2019 12:19 am

reverse half reaction

Postby Abigail Menchaca_1H » Sun Mar 15, 2020 11:10 pm

How do you know which half redox reaction to reverse and change the sign of the potential?

EllieSchmidtke_4I
Posts: 51
Joined: Wed Feb 20, 2019 12:16 am

Re: reverse half reaction

Postby EllieSchmidtke_4I » Sun Mar 15, 2020 11:11 pm

The equation that is reversed is the anode (oxidized) reaction.

PranaviKolla2B
Posts: 114
Joined: Fri Aug 30, 2019 12:17 am

Re: reverse half reaction

Postby PranaviKolla2B » Sun Mar 15, 2020 11:27 pm

Why is that? Why is the anode reaction reversed?

Vuong_2F
Posts: 90
Joined: Sat Sep 14, 2019 12:17 am

Re: reverse half reaction

Postby Vuong_2F » Mon Mar 16, 2020 1:46 am

PranaviKolla2B wrote:Why is that? Why is the anode reaction reversed?

i believe it is because when you are given two equations and their potential values, it is the standard reduction potential values for both. therefore for the anode cell reaction where oxidation is taking place, you must reverse it to account for the fact that electrons are being lost not gained.

Diana A 2L
Posts: 106
Joined: Sat Aug 17, 2019 12:16 am
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Re: reverse half reaction

Postby Diana A 2L » Mon Mar 16, 2020 8:49 am

In that case, does that mean cell potentials are calculated first, only using the standard reduction potentials? Like, you calculate cell potential before flipping the equation that is oxidized? Right?


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