## Different Versions of the Nernst Equation

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

nicoleclarke_lec1M
Posts: 25
Joined: Sat Jul 09, 2016 3:00 am

### Different Versions of the Nernst Equation

I know that there are three different versions of the Nernst Equation, and I understand the derivations for each one. I was wondering, though, when you would use the one with ln vs when you would use the one with log. I also was wondering why in the example on page 53 of the course reader (the Concentration Cell with Ag), why did we use the equation which assumes that this reaction occurred at 25 degrees Celsius?

Brandon N 3A
Posts: 7
Joined: Wed Sep 21, 2016 2:56 pm

### Re: Different Versions of the Nernst Equation

In lecture it was mentioned that the nernst equation with log instead of ln is used a lot when dealing with biological reactions because its better fitted to deal with pH (since pH calculations involve log base 10 and not ln). As for the example on page 53, since were solving for Ecell from Estandard, we use/assume the standard temp. of 25 degrees celsius. I think.

Lyndon_Bui_3J
Posts: 27
Joined: Sat Jul 09, 2016 3:00 am

### Re: Different Versions of the Nernst Equation

Does anyone know if we have to know these equations for the test?

Return to “Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)”

### Who is online

Users browsing this forum: No registered users and 1 guest