Determine E° for the half-reaction Fe³⁺(aq) + e⁻ → Fe²⁺(aq).

Question

Fe3+ + H2 > 2H+ + Fe2+

E+ +0.77V

Answer 1

There is no determining Eº for the half reaction Fe3+ + e- ==> Fe2+. You simply look it up in a table of standard reduction potentials and find it to be +0.77V. Maybe that's not the question you are meaning to ask, but I'm not sure what your question is.