Calculate Standard Potential from Half Reaction

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Nivi Ahlawat 3I
Posts: 24
Joined: Fri Sep 25, 2015 3:00 am

Calculate Standard Potential from Half Reaction

Postby Nivi Ahlawat 3I » Sun Feb 07, 2016 6:41 pm

For HW 14.27, why is it that we need to convert the E0 values into deltaG0 values?
Why isn't the answer simply -1.79V + (-0.61V)?

Question: 14.27 Using data in Appendix 2B, calculate the standard potential for the half-reaction U4+(aq) + 4e- --> U(s).
The half reactions I used are
U3+ + 3e- --> U E0 = -1.79V
U4+ + e- --> U3+ E0 = -0.61V

Raneem Mokatrin 3F
Posts: 17
Joined: Fri Sep 25, 2015 3:00 am

Re: Calculate Standard Potential from Half Reaction

Postby Raneem Mokatrin 3F » Sun Feb 07, 2016 8:02 pm

You cannot just add reduction potentials because E is not a state property, while delta G is.


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