The redox reaction of peroxydisulfate with iodide has been used for many years as part of the iodine clock reaction which introduces students to kinetics. If Eºcell = 1.587 V and Eº of the anode half-cell is 0.536 V, what is Eº of the cathode half-cell?
S2O82-(aq) + 2H++ 2 I-(aq) ? 2HSO4-(aq) + I2(aq)