080, Zn is intended to be plated on the surface of Pt and Zn electrodes in an aqueous pH = 7 solution where Zn2+ ions ar

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080 Zn Is Intended To Be Plated On The Surface Of Pt And Zn Electrodes In An Aqueous Ph 7 Solution Where Zn2 Ions Ar 1 (61.13 KiB) Viewed 80 times

080, Zn is intended to be plated on the surface of Pt and Zn electrodes in an aqueous pH = 7 solution where Zn2+ ions are dissolved at 0.01 M. At this time, hydrogen is generated as a side reaction. The exchange current density of the hydrogen generation reaction is 8x10-4 A/cmolat Pt and 5x10-11 A/cm0|cat Zn electrodes. (a) Calculate the equilibrium voltage of the 0.01 M Zn2+ solution, and calculate the magnitude of the hydrogen generation current at the Pt and Zn electrodes at this equilibrium voltage. (b) Determine whether Zn can be plated on Pt and Zn electrodes. Suppose that T = 298 K, ac = 0.5 in <Equation 4-23>, and the activity coefficient of all ions s is 1.0.