## Reversing the anode

ursulavictorino1K
Posts: 55
Joined: Sun Feb 17, 2019 12:15 am

### Reversing the anode

Why is it that the anode reaction is always reversed when determining the cell potential?

405268063
Posts: 102
Joined: Thu Jul 25, 2019 12:17 am

### Re: Reversing the anode

The standard cell potentials are written so that each compound is gaining electrons (aka cathode reaction) so if we want the equation where electrons are actually being lost, you have to reverse that standard cell potential value.

Jesse H 2L
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Joined: Fri Aug 09, 2019 12:17 am
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### Re: Reversing the anode

to get the real cell potential, we need to reverse the anode reduction reaction to make it an oxidation reaction.

SarahCoufal_1k
Posts: 102
Joined: Thu Jul 25, 2019 12:17 am

### Re: Reversing the anode

Because all cell potentials are given in the reduction form and since the anode is being oxidized you switch the equation around so it represents that. Then when. calculated Ecell you can either do Ecathode-Eanode. or Ereduction+Eoxidation but you have to reverse the sign of the oxidation one

Nawal Dandachi 1G
Posts: 102
Joined: Sat Sep 28, 2019 12:16 am

### Re: Reversing the anode

Because we need to show that it is being oxidized, so we flip it

Brandon Valafar
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### Re: Reversing the anode

Since all the cell potentials are given for reduction reactions, we have to flip the equation and the cell potential to get it for cell potential for the oxidation reaction, for the anode.

Sanjana K - 2F
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### Re: Reversing the anode

The values in the table are always standard reduction potentials, so since the anode is being oxidized and not reduced, the sign gets flipped.

WesleyWu_1C
Posts: 117
Joined: Thu Jul 25, 2019 12:16 am

### Re: Reversing the anode

The anode reaction is always reversed because usually when you look at the table, you get the reduction reaction the standard reduction potential. Since the anode is where oxidation occurs, you want the oxidation reaction. Therefore you would flip the reduction reaction to get the oxidation reaction, which means you would also make flip the sign of the standard reduction potential to get the standard oxidation potential.

ursulavictorino1K
Posts: 55
Joined: Sun Feb 17, 2019 12:15 am

### Re: Reversing the anode

If they are always given as recutions, How do you know which to flip to an oxidizer?

Jiyoon_Hwang_2I
Posts: 101
Joined: Sat Sep 14, 2019 12:17 am

### Re: Reversing the anode

ursulavictorino1K wrote:If they are always given as recutions, How do you know which to flip to an oxidizer?

If they give you the cell potentials of each reaction, the reaction with the lower cell potential is the one that is oxidized so it will be flipped