Textbook Example 14.9 Cathode/Anode

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Antonio Melgoza 2K
Posts: 33
Joined: Fri Sep 25, 2015 3:00 am

Textbook Example 14.9 Cathode/Anode

Postby Antonio Melgoza 2K » Tue Feb 09, 2016 12:08 am

How can you tell which one will be the cathode and which will be the anode? The cell diagram has Zn(s) | Zn2+ on the left side but why can't it be on the right side?

Victoria Le 1E
Posts: 10
Joined: Fri Sep 25, 2015 3:00 am

Re: Textbook Example 14.9 Cathode/Anode

Postby Victoria Le 1E » Tue Feb 09, 2016 9:39 am

The Daniell cell will always be set up with each of those at the cathode, just because it is a specific experiment. But, if you look up the standard cell potentials for each reaction, the reaction with the biggest standard cell potential of reduction you will want at the cathode, and the smaller one will be at the anode for the great total standard cell potential.

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