E standard

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E standard

Postby camrynpatterson3C » Tue Feb 20, 2018 8:57 pm

When you flip an equation, such as what we have to do for the half reactions in some parts of 14.11, does the sign of E standard not change??

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Joined: Sat Jul 22, 2017 3:01 am

Re: E standard

Postby skalvakota2H » Tue Feb 20, 2018 9:12 pm

Typically, when we flip the reduction half reaction so that the electrons are on the left hand side, we are required to change the sign of E°.
However, when we are using the E°cell=E°cathode-E°anode, the subtraction operation already accounts for the sign switch, hence we can use the standard reduction potentials as given for both oxidation and reduction half reactions.

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