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Posted: Tue Mar 03, 2020 12:20 pm
how exactly do you determine n or the number of electrons transferred
Posted: Tue Mar 03, 2020 12:46 pm
I think you find the amount of electrons transferred in the balanced reaction. So it is the number of electrons that eventually cancels out.
Posted: Tue Mar 03, 2020 12:55 pm
You would determine it from your half reaction (making sure that both of them have the same number of electrons; if not, multiply one with another)
Posted: Tue Mar 03, 2020 1:50 pm
The number of electrons transferred, n, can be found by looking at the two half-reactions that are combined to formed the overall reaction of the cell. Electrons being lost in the oxidation rxn should be equal to the number of electrons being gained in the reduction rxn. Therefore, if the number of electrons in the half-rxns do not match, make sure to multiply the rxns by a factor that makes them equal to each other (so that they can cancel out).
Posted: Tue Mar 03, 2020 1:52 pm
The number of electrons transferred is determined by your half-reactions. n is equal to the same number of electrons needed (in both the oxidation and reduction reactions) to balance out the charge between the reactants and products.