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Use the data in Table 25.6 in ATKINS for the exchange current density and transfer coefficient for the reaction: 2 H+ + 2e- → H2 on nickel at 25oC to determine what current density would be needed to obtain an overpotential of 0.20 V as calculated from

Use the data in Table 25.6 in ATKINS for the exchange current density and transfer coefficient for the reaction: 2 H+ + 2e- → H2 on nickel at 25oC to determine what current density would be needed to obtain an overpotential of 0.20 V as calculated from

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
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Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Use the data in Table 25.6 in ATKINS for the exchange current density and transfer coefficient
for the reaction:

2 H+ + 2e- → H2

on nickel at 25oC to determine what current density would be needed to obtain an overpotential
of 0.20 V as calculated from:

(a) the Butler-Volmer equation
(b) the Tafel equation.

Is the validity of the Tafel approximation affected at overpotentials of 0.4 V and more?

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