Identifying anode and cathode

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lauren chung 2f
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Joined: Fri Sep 29, 2017 7:03 am

Identifying anode and cathode

Postby lauren chung 2f » Wed Feb 21, 2018 10:07 am

At the top of page 575 in the textbook, for the reaction Cu(s)|Cu2+(aq)||Zn2+(aq)|Zn(s), it says that Cu(s) is the cathode and Zn (s) is the anode. But shouldn't it be the other way around since Cu is being oxidized and Zn is being reduced?

Austin Ho 1E
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Joined: Fri Sep 29, 2017 7:04 am
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Re: Identifying anode and cathode

Postby Austin Ho 1E » Wed Feb 21, 2018 10:09 am

The reason why the cathode and anode are switched is because for this example they are writing the reverse cell potential and demonstrating how that would be setup. In general however, it should be anode||cathode, so you are correct.

lauren chung 2f
Posts: 50
Joined: Fri Sep 29, 2017 7:03 am

Re: Identifying anode and cathode

Postby lauren chung 2f » Wed Feb 21, 2018 10:13 am

But on the same page it says "A negative cell potential indicates that the right-hand electrode in the cell diagram is the anode (the site of oxidation, where electrons leave the cell)", but isn't the right-hand electrode being reduced in the example?


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