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Topic: calculate E at 25°C for a cell  (Read 2942 times)

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Offline vmaggio

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calculate E at 25°C for a cell
« on: August 05, 2007, 08:19:45 PM »
Given that P(H2) = 0.100 atm, [Cd2+] = 0.200 M, and [H+ ] = 1.00 x 10-5 M, calculate E at 25°C for a cell based on the following reaction:

    Cd(s) + 2 H+(aq)  ===>  H2(g) + Cd2+(aq), E° = +0.40 V.



A. -0.09 V
B. +0.12 V
C. + 0.15 V
D. +0.30 V
« Last Edit: August 05, 2007, 08:38:27 PM by Mitch »
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Offline sdekivit

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Re: calculate E at 25°C for a cell
« Reply #1 on: August 06, 2007, 03:58:50 AM »
first set up you Nernst-equation (including the partial pressure of H2) and determine the amount of electrons transported. Then plug in the numbers and calculate E.
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