calculating standard cell potential

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205192823
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Joined: Wed Sep 18, 2019 12:19 am

calculating standard cell potential

Postby 205192823 » Sun Mar 15, 2020 7:22 am

How would I calculate a standard cell potential, given the half-reactions for the cell and their standard potentials?

Charisse Vu 1H
Posts: 101
Joined: Thu Jul 25, 2019 12:17 am

Re: calculating standard cell potential

Postby Charisse Vu 1H » Sun Mar 15, 2020 1:35 pm

You would take take the standard potential of the cathode and subtract the standard potential of the anode from it.

Deepika Reddy 1A
Posts: 125
Joined: Thu Jul 11, 2019 12:15 am

Re: calculating standard cell potential

Postby Deepika Reddy 1A » Sun Mar 15, 2020 1:38 pm

When the standard potentials of half-reactions are given, they are given from the reduction standard table. Looking at the two values, choose the smaller value to be the oxidation half-reaction. Since the standard potential is from the reduction table, flip the value so it is the opposite and it matches the oxidation half-reaction. Then, add the two values to get the overall standard cell potential.

Philomena 4F
Posts: 27
Joined: Wed Feb 27, 2019 12:16 am

Re: calculating standard cell potential

Postby Philomena 4F » Mon Mar 16, 2020 5:26 pm

You have to determine which of the half rxns is the cathode (reduction) and anode (oxidation). Then you plug in the given E values for those reactions to the formula Ecell = Ecat - Ean.

Callum Guo 1H
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Re: calculating standard cell potential

Postby Callum Guo 1H » Mon Mar 16, 2020 5:29 pm

Find out which one is the cathode and which one is the anode. And then plug it into the equation E= Ereduction - Eoxidation

Ayushi2011
Posts: 101
Joined: Wed Feb 27, 2019 12:17 am

Re: calculating standard cell potential

Postby Ayushi2011 » Mon Mar 16, 2020 5:59 pm

You would do standard potential of cathode minus the standard potential of anode.

Owen-Koetters-4I
Posts: 50
Joined: Fri Sep 28, 2018 12:16 am

Re: calculating standard cell potential

Postby Owen-Koetters-4I » Mon Mar 16, 2020 8:18 pm

subtract the standard potential of the anode (left) from the standard potential of the cathode (right)


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