## Final Winter 2013

$E_{cell} = E_{cell}^{\circ}-\frac{RT}{nF}\ln Q$

camrynpatterson3C
Posts: 44
Joined: Fri Sep 29, 2017 7:07 am

### Final Winter 2013

Question 4 about the droplets assumes that the number of moles is 4. How do we know this??

Christiana2D
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Joined: Fri Sep 29, 2017 7:06 am

### Re: Final Winter 2013

The number 4 is the moles of electrons being transferred in the reaction. This number can be determined by looking at the number of electrons present in the half reactions, or by looking at the oxidation numbers of the reactants and products. For the products the Iron has a plus 4 charge and the OH minus combined has a -4 charge.

ZoeHahn1J
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### Re: Final Winter 2013

We know n=4 because that's the number of moles of electrons transferred when Fe is oxidized and O2 is reduced - split the reaction into two half reactions to check.