Midterm 2015 Q6

[Jingyuan_Fu_3E]

For this question I understand how K is calculated using the formila -RTlnK. However, when I tried to apply another formula E=E nod-0.05916V/n logQ, and tried to assume E=0 since at this time Q=K at equilibrium, I found that the answer that I calculated is not the same as the answer given. Could someone show me what I did wrong or is there any alternative way besides the way provided in the coursereader?

[Chem_Mod]

You should get the same answer, try to use ln instead of log, there is some rounding issues in the constant you have in your calculation.