Question: For the exercise in this topic, base your answers on the potentials listed in Table 6M.1 or Appendix 2B, with the exception of the reduction

For the exercise in this topic, base your answers on the potentials listed in Table 6M.1 or Appendix 2B, with the exception of the reduction and oxidation of water at pH = 7: 2 HO(1) + 2 e H(g) + 2 OH (aq), E = O(g) + 4H+ (aq) + 4e 2 HO (1), E = -0.42 V at pH = 7 +0.82 V at pH = 7 Copper from 200.0 mL of a solution of copper(II) sulfate is plated on to the cathode of an electrolytic cell.

(a) Hydronium ions are generated at one of the electrodes. Is this electrode the anode or cathode?

(b) How many moles of H₃O⁺ are generated if a current of 0.120 A is applied to the cell for 30.0 h?

(c) If the pH of the solution was initially 7.0, what will be the pH of the solution after the electrolysis? Assume no change in the volume of solution. TABLE 6M.1 Standard Potentials at 25 C* Species Oxidized form is strongly oxidizing F/F Aut/Au Ce*+/Ce+ MnO

2 HO(1) + 2 e H(g) + 2 OH (aq), E = O(g) + 4 H (aq) + 4e 2 HO (1), E = -0.42 V at pH = 7 +0.82 V at pH = 7

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