I cant seem to get this and i dont know why
Ce4+ + e− > Ce3+ E° = 1.72 V
Fe3+ + e− > Fe2+ E° = 0.771 V
If a solution is prepared by mixing 5.0 mL of 0.30 M Fe2+ with 3.0 mL of 0.12 M Ce4+.
What is the potential of a platinum electrode dipped into the resulting, equilibrated, solution (relative to SHE)?
I have three chances to do this and i put..
0.949 and
2.491
I AM LOST