Answered: is as follows: Zn (s) + Cl2 (g, 1 atm.)…

Principles of Modern Chemistry

8th Edition

ISBN:9781305079113

Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Chapter17: Electrochemistry

Section: Chapter Questions

Problem 14P

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Question

The Zn-Cl battery has been suggested as an energy generator in transportation. The reaction
is as follows:
Zn (s) + Cl₂ (g, 1 atm.) ZnCl₂ (aq)
a) Write the reaction that takes place in each half-cell.
b) Being and , calculate the standard potential, Eºcell,
and ∆G⁰.
c) It the molality of the electrolyte ZnCl₂ is of 0.1 m, employ the Debye-Hückel law for calculating the average ionic activity coefficient (γ±), the average ionic activity (a±) and the
electrolyte’s activity (a₂)
d) Calculate the cell potential (Ecell), at 25 °C, using the values obtained in the previous section.

is as follows:
Zn (s) + Cl2 (g, 1 atm.) →ZnCl2 (aq)
a) Write the reaction that takes place in each half-cell.
E'.
b) Being V2C1,/cr
and AGº.
=1.36 V
E
= -0.763 V
Zn²"/Zn
calculate the standard potential, E°cell,
and
c) It the molality of the electrolyte ZnCl2 is of 0.1 m, employ the Debye-Hückel law for
calculating the average ionic activity coefficient (y=), the average ionic activity (a±) and the
electrolyte's activity (a2)
d) Calculate the cell potential (Ecell), at 25 °C, using the values obtained in the previous
section.

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