The Nernst Equation

Moderators: Chem_Mod, Chem_Admin

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.

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