Under standard conditions for all concentrations, the following reaction is spontaneous at 25oC. O3(g) + 2H+(aq) +

Question:

Under standard conditions for all concentrations, the following reaction is spontaneous at 25oC.
O3(g) + 2H+(aq) + 2Co2+(aq) →
O2(g) + H2O(l) + 2Co3+(aq)
If [H+] is adjusted by adding a buffer of 0.10 M NaClO and 0.10 M HClO (Ka = 3.5 × 108), what value will Ecell have, and will the reaction be spontaneous at this [H+]?