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Topic: Did our prof. get this wrong? [electrochemistry]  (Read 1048 times)

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Offline Bor

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Did our prof. get this wrong? [electrochemistry]
« on: June 11, 2018, 06:25:50 PM »
Hello, the question and all of the data is as follows:

There is an electrochemical cell with the reaction Cd(s) + Fe2+(aq)  :rarrow: Cd2+(aq) + Fe(s) .
E0Cd2+|Cd = -403V and E0Fe2+|Fe = -0.447V .
Calculate the potential of such a cell.


also, I think there should have been a two-sided arrow in the reaction, not a one-sided.

Offline Babcock_Hall

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Re: Did our prof. get this wrong? [electrochemistry]
« Reply #1 on: June 11, 2018, 06:32:49 PM »
What answer did you calculate?

Offline Bor

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Re: Did our prof. get this wrong? [electrochemistry]
« Reply #2 on: June 12, 2018, 02:09:29 AM »
We calculated the answer to be 0,0029V

Offline Borek

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Re: Did our prof. get this wrong? [electrochemistry]
« Reply #3 on: June 12, 2018, 03:06:14 AM »
also, I think there should have been a two-sided arrow in the reaction, not a one-sided.

Potential difference is not large, but the direction of the reaction is quite obvious.

No idea how you got 0.0029 V, it is an order of magnitude too low.

It is a trivial question, my bet is you have overcomplicated it.

(BTW: -0.403 V, not -403 V)
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