6th edition, 6L3

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Elizabeth Gallmeister 1A
Posts: 41
Joined: Fri Sep 28, 2018 12:21 am

6th edition, 6L3

Postby Elizabeth Gallmeister 1A » Wed Feb 20, 2019 11:54 pm

How can we tell which side is the anode and which is the cathode? It doesn't always follow the convention. Like with part a, it did follow the convention with Ni|Ni2+||Ag+|Ag where Ni was oxidized. But for part b, it didn't follow convention with C|H2|H+||Cl-|Cl2|Pt because H2 was involved in the reduction, not the oxidation. Given the E values for the half reactions, is there a way to figure out which one got reduced and which got oxidized?

A De Castro 14B 2H
Posts: 75
Joined: Fri Sep 28, 2018 12:29 am

Re: 6th edition, 6L3

Postby A De Castro 14B 2H » Thu Feb 21, 2019 4:30 pm

E values of half reactions can be used to figure out which one is reduced and oxidized. A more positive reduction potential will tend to be reduced (i.e. gain electrons), while a comparatively more negative reduction potential will tend to be oxidized (i.e. lose electrons).


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