7. For the oxidation-reduction reaction
S4O62-(aq) + Cr2+(aq)→ Cr3+(aq) + S2O32-(aq) ε°cell = 0.48V
the appropriate half-reactions are
S4O62-(aq) + 2e- →S2O32-(aq) ε° = 0.17V
Cr3+(aq) + e- →Cr2+(aq) ε° = -0.50V
Balance the redox reaction and calculate εo and K (equilibrium constant)? (10 %)