Textbook Problem #14.27

Moderators: Chem_Mod, Chem_Admin

TramHo2G
Posts: 31
Joined: Wed Sep 21, 2016 2:59 pm

Textbook Problem #14.27

Postby TramHo2G » Mon Feb 13, 2017 10:04 pm

Using data from Appendix 2B, calculate the standard potential for the half-reaction U4^+(aq) + 4e- -> U(s)

Can someone explain how to do this problem?

Chem_Mod
Posts: 18400
Joined: Thu Aug 04, 2011 1:53 pm
Has upvoted: 435 times

Re: Textbook Problem #14.27

Postby Chem_Mod » Mon Feb 13, 2017 11:37 pm

You have to convert standard reduction potential to Gibbs free energy (which is equal to nFE)and then solve for E.

Andrew Nguyen 3G
Posts: 22
Joined: Wed Sep 21, 2016 2:59 pm

Re: Textbook Problem #14.27

Postby Andrew Nguyen 3G » Tue Feb 14, 2017 12:29 am

In that problem, why does adding the two standard cell potentials and their respective half reactions using a Hess' Law approach not work? When added together, we still get U4^+(aq) + 4e- -> U(s) but E equals -2.4 instead of the correct answer.


Return to “Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams”

Who is online

Users browsing this forum: No registered users and 2 guests