Predict the anode and cathode half-reactions for the electrolysis of aqueous potassium
chloride, KCl, given the following reduction potentials.
K+ (aq) + e- → K (s) E ored = - 2.92 V
2 H 2 O (l) + 2 e- → H 2 (g) + OH - (aq) E red = - 0.41 V (at pH = 7)
Cl 2 (g) + 2 e- → 2Cl - (aq) E ored = + 1.36 V
O 2 (g) + 4 e- + 4 H + (aq) → 2 H 2 O (l) E red = + 0.82 V (at pH = 7)
A) K+ reduced, Cl - oxidized
B) H 2 O reduced, Cl- oxidized
C) K+ reduced, H2 O oxidized
D) H 2 O reduced, H 2 O oxidized
E) H 2 O reduced, O 2 oxidized