It does not double?

[Cofo]

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What is the standard cell potential for the following reaction?
2Ag + Co2+ → 2Ag+ + Co
^this is a question on chad's quizzes from 7.3 gen chem

Doubling the half-rxn does NOT change the potential. I understand that...but the question says there are 2 silver atoms as reactants...so...why do we not add Silver's EMF twice? Chad says to only add it once. I'm sure he is correct, but just for my personal understanding...why?

 

[Alphanumerdent]

In the video chad explains that the cell potentials are measured in Volts. A volt is a J/C. As you change the coefficients by lets say x2 it changes both Joules and Coulombs by x2 thus giving you the same Ecell potential in Volts.

 

[Cofo]

In the video chad explains that the cell potentials are measured in Volts. A volt is a J/C. As you change the coefficients by lets say x2 it changes both Joules and Coulombs by x2 thus giving you the same Ecell potential in Volts.

lol...i watched the next video and it explained to me why. grrr this always happens. thanks bro👍

 

[Alphanumerdent]

Oh ya hahaha. a few of those quiz questions are out of order and come before he teaches it. I remember that happening to me a few times.

 

[toothhornet88]

also this is what i read from wikipedia (not sure if this answers the question in one way or another):

" Note that the electrode potentials are independent of the number of electrons transferred—that is, they are set to one mole of electrons transferred—and so the two electrode potentials can be simply combined to give the overall cell potential even if different numbers of electrons are involved in the two electrode reactions."