The Nernst Equation


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Tamera Scott 1G
Posts: 65
Joined: Fri Sep 28, 2018 12:27 am

The Nernst Equation

Postby Tamera Scott 1G » Mon Feb 25, 2019 6:53 pm

In the 6th edition, the textbook goes over example 14.10: Using the Nernst Equation to find a Concentration. I don't understand where the ln Q= -0.42V/0.02593V came from. Can someone explain?

Mindy Kim 4C
Posts: 65
Joined: Fri Sep 28, 2018 12:25 am

Re: The Nernst Equation

Postby Mindy Kim 4C » Tue Feb 26, 2019 11:58 am

The sentence in the blue box above that section explains it pretty well: "From Ecell=Ecell(standard)-(RT/nF)lnQ rearranged into lnQ= -Ecell/(RTnF)" In this example, Ecell standard is equal to zero because the electrodes are identical in their standard state so there is no voltage in the cell.


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