## Finding n

$\Delta G^{\circ} = -nFE_{cell}^{\circ}$

Ryan Danis 1J
Posts: 66
Joined: Fri Sep 28, 2018 12:18 am

### Finding n

Is n just the number of electrons that appear on either side of each half reaction (ie: amount of electrons added to the oxidation side, that are then transferred from anode to cathode?)

Sydney To 1D
Posts: 60
Joined: Fri Sep 28, 2018 12:15 am

### Re: Finding n

Yes. For $\Delta G=-nFE$, n is the number of electrons that are transferred in the reaction

varunhariharan
Posts: 30
Joined: Mon Jan 07, 2019 8:16 am

### Re: Finding n

n is the number of electrons being transferred. However, make sure that both half-reactions are balanced before using n, as the number of electrons being transferred should stay consistent in the equation.

monikac4k
Posts: 56
Joined: Fri Sep 28, 2018 12:25 am

### Re: Finding n

When finding n, you would want to solve for both the oxidation and the reduction half reactions. Once you get there, see how many moles of electrons are transferred in the completely balanced redox reaction; this number of moles is the number you want to use for n.

Michael Novelo 4G
Posts: 64
Joined: Fri Sep 28, 2018 12:28 am

### Re: Finding n

Yes initially I believed it had to do with stoichiometric coefficients since it had to do with moles but it has to do with the oxiditation state and electrons transferred in a balanced redox equation.

Nicholas Le 4H
Posts: 74
Joined: Fri Sep 28, 2018 12:24 am

### Re: Finding n

Yes, n is the number of moles of electrons transferred and can be found through the oxidation or reduction half reactions.

Jchellis 1I
Posts: 61
Joined: Fri Sep 28, 2018 12:15 am

### Re: Finding n

So it is the -e- that is in your reaction.

Mhun-Jeong Isaac Lee 1B
Posts: 54
Joined: Fri Sep 28, 2018 12:17 am

### Re: Finding n

Yeah a lot of people get it mixed up with the total moles of reactants and products but it is the electrons transferred. Always make sure it is the number of electrons after you balance the half-reactions and make sure the electrons cancel out.

Diana Sandoval 1K
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Joined: Fri Sep 28, 2018 12:25 am
Been upvoted: 1 time

### Re: Finding n

Yes, it is the amount of electrons added on both sides (of course they should be the same number).

armintaheri
Posts: 68
Joined: Fri Sep 28, 2018 12:26 am

### Re: Finding n

For example, if one mole of Fe were being oxidized to Fe2+, n would be 2 because 2 moles of electrons would be transferred. If Fe had a coefficient other than one, you would multiply it by 2.

Aleeque Marselian 1A
Posts: 60
Joined: Fri Sep 28, 2018 12:24 am

### Re: Finding n

n is the number of electrons transferred after you've balance the oxidation and half reactions.

Tony Chung 2I
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Joined: Fri Sep 28, 2018 12:19 am

### Re: Finding n

n is just the number of balanced electrons

Searra Harding 4I
Posts: 68
Joined: Fri Sep 28, 2018 12:29 am

### Re: Finding n

So if one half reaction transfers 2 electrons and the other half reaction transfers 3 electrons, would n be 6? This way they would cancel out in the total reaction.