### Cell Potential

Posted:

**Tue Feb 20, 2018 4:51 pm**when do you use each of the equations and what is the difference?

E = E° -RT/nF * ln Q

E = E° -0.05916 V / n * log Q

E = E° -RT/nF * ln Q

E = E° -0.05916 V / n * log Q

Created by Dr. Laurence Lavelle

https://lavelle.chem.ucla.edu/forum/

https://lavelle.chem.ucla.edu/forum/viewtopic.php?f=141&t=28204

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Posted: **Tue Feb 20, 2018 4:51 pm**

when do you use each of the equations and what is the difference?

E = E° -RT/nF * ln Q

E = E° -0.05916 V / n * log Q

E = E° -RT/nF * ln Q

E = E° -0.05916 V / n * log Q

Posted: **Tue Feb 20, 2018 5:49 pm**

You can use either of the equations cause they are the same. The second equation essentially combines the R, T, and F to get 0.05916 and then takes into account the change from ln to log. Generally log is more efficient to use for biochemistry purposes rather than ln but both are valid.

Posted: **Wed Feb 21, 2018 6:52 pm**

since R T and F are all constants in standard conditions, these three constants can be multiplied and calculated to be 0.05916, just to simplify the process of calculations.

Posted: **Thu Feb 22, 2018 2:39 am**

Both of these equations are the same. constants R, T, F = to .05916

Posted: **Mon Feb 26, 2018 9:25 pm**

These equations are essentially the same so you can use them interchangeably depending on which information you have.

Posted: **Mon Feb 26, 2018 9:31 pm**

These equations are equivalent to each other, it is just that one is simplified.

Posted: **Mon Feb 26, 2018 10:47 pm**

These equations can be used in the same situation, however the one with a number already in it has been simplified with the entry of variables already.

Posted: **Tue Feb 27, 2018 9:05 pm**

Because R, T and F are constants at standard conditions, the second equation is the same as the first equation with the constants computed into a single constant.

Posted: **Thu Mar 15, 2018 7:52 pm**

They're the same, you can use either

Posted: **Sun Mar 18, 2018 8:26 pm**

when you do you switch the signs of given cell potentials?