Calculate the potential for the following electrochemical cell Cu  Cu2+(0.05M) Cr2O72-(0.02M), Cr3+(0.005M), H+(0.1M) Pt

Question

.    Calculate the potential for the following electrochemical cell

                     Cu I Cu2+(0.05M) II Cr2O72-(0.02M), Cr3+(0.005M), H+(0.1M) I Pt

Answer 1

I think we need to know the standard reduction potentials for the 2 half reactions. That is, we need standard reduction potential for Cu²⁺ + 2e- ==> Cu(s) and for Cr₂O₇^2- ==> Cr³⁺ (Cr⁶⁺ + 3e- => Cr³⁺). You'll then need to use the Nernst equation. If you can provide the missing information, I may be able to help you solve the problem.