1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The Nernst Equation- I apologize in advance for my ignorance

  1. Sep 26, 2015 #1
    Ecell = E0cell - (RT/nF)lnQ
    So I understand the Nernst Equation, but I don't have some info. (Please bare with me, I'm in secondary)
    I'm doing a Cu - Al cell. My E cell is negative (-1.33). Does this have an affect on the equation?
    What exactly does E0 stand for?
    I understand how to find E cell, but do I square it by something? I can't find online how many electrons are swapped. How many electrons are swapped?
    How do you factor in the pH? I
    've calculated the pH and the number of ions in it, but where do i add this in on the equation? Please lay it out how you would in the equation so I can see
    I'm stuck on R (gas constant, which is 8.31 (volt-coulomb)/(mol-K)). I can't figure out the volt-coulomb as i don't know the voltage. How can I calculate the coulomb? Then the volt-coulomb? And is Mol-K (Mole)(Kelvin)? If so, do I factor in the temperature in Kelvins twice?
    For N (n = number of moles of electrons exchanged in the electrochemical reaction) do i just multiply the moles per electron?
    Finally - What exactly am I dividing to calculate Q? (How do I calculate Q?)

    Please explain this all in basic jargon - or just normal English if you prefer. My vocabulary is limited. Thank you!
    Last edited: Sep 26, 2015
  2. jcsd
  3. Sep 26, 2015 #2


    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

Share this great discussion with others via Reddit, Google+, Twitter, or Facebook