In acidic solution, O3 and Mn2+ ions react spontaneously:

O3(g) + Mn2+(aq) + H2O(l) ⟶

O2(g) + MnO2(s) + 2H+(aq) E°

cell = 0.84 V

(a) Write the balanced half-reactions.

(b) Using Appendix D to find E°

ozone, calculate E°

manganese.