29. -1. The A bipolar-membrane electrolyzer is used to reduce KNO3 to produce NH3, as shown in the figure below. The Faradaic efficiency for ammonia, FE(NH3), can electron required to form P reach 90% [Faradaic efficiency: FE(P) electronspassed through the electrode Faradaic efficiency for producing other gas(es) is 50%. During operation, H2О dissociates in the interfacial (middle) layer of the bipolar membrane to generate H+ and OH, which migrate toward the two electrodes under the electric field. Which of the following statements is correct? Power gas gas supply Electrode a Compartment I HO-H++OH Electrode b Compartment II KNO bipolar-membrane KOH solution solution
(A) Electrode potential: the potential of electrode a is higher than that of electrode b.
(B) The OH produced by water dissociation in the bipolar membrane migrates toward electrode a.
(C) The overall reaction in compartment I is: NO3+8 e+ 6 H2O → NH3 +9 OH.
(D) When 11.2 L of gas is produced at the anode (at standard conditions), 0.45 mol of NH3 is produced at the cathode.
(E) Hydrogen and oxygen gases are evolved from compartment II.