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Homework Help: Electrochemistry, emf vs HCL concentration

  1. Jan 29, 2012 #1
    1. The problem statement, all variables and given/known data

    I just conducted a lab for pchem where we took electric potential measurements with a volt meter in a solution for the reaction

    AgCl(s) +1/2 H2 (g) <--> HCl(aq) + Ag(s)

    We took the measurements using different concentrations of HCl.

    We were told that the electric potential emf measurements should go up as the concentration of HCl went up. However, our results did the exact opposite.

    I am wondering if anyone has an idea of what we could have gone wrong?

    2. Relevant equations

    3. The attempt at a solution
  2. jcsd
  3. Jan 29, 2012 #2


    User Avatar

    Staff: Mentor

    You better believe your experimental results, not what you were told.

    Can you write Nernst equation for the silver reduction half cell?

    What happens to the concentration of Ag+ as the concentration of HCl goes up?
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