Example 14.7

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Gurvardaan Bal1L
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Example 14.7

Postby Gurvardaan Bal1L » Tue Feb 20, 2018 4:38 pm

Why is the reaction with the higher standard potential considered to be at the cathode? Is this always how we should approach assigning rxns to different electrodes?

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Re: Example 14.7

Postby skalvakota2H » Tue Feb 20, 2018 9:24 pm

A way to determine which species is reduced and/or oxidized is by comparing the values of standard potentials for the species. Whichever one has the more positive potential, this species is the one with greater electron-pulling power as a reduction half reaction, meaning this species is more likely to occur as a reduction. Hence, it is a good way to use standard potentials as a method of differentiating between tendencies for oxidation and reduction.

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