Question 14.35b Solution Manual Error?

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Jasmeet Dhaliwal 3E
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Joined: Fri Sep 25, 2015 3:00 am

Question 14.35b Solution Manual Error?

Postby Jasmeet Dhaliwal 3E » Thu Feb 04, 2016 4:06 pm

This question asks to determine the equilibrium constant for the reaction:
In3+(aq) + U3+(aq) <-> In2+(aq) + U4+(aq)

My calculated value of E° matched the value in the solutions manual, +0.12 V. However, when the solutions manual plugged in this value into the equation ln K = nFE°/RT, it used the value of 2 for n, even though it appears as though it should be 1, because only one mole of electrons is being transferred in this reaction. I think this error stems from the fact that the solutions manual incorrectly wrote the indium reduction half-reaction as In3+(aq) + 2e- -> In2+(aq). Can someone validate this error?

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Re: Question 14.35b Solution Manual Error?

Postby Chem_Mod » Thu Feb 04, 2016 7:14 pm

Yes, they misprinted the cathode reaction in the solutions. Could you please add this to the forum on solutions manual errors?

Nick Lewis 4F
Posts: 111
Joined: Wed Sep 18, 2019 12:18 am

Re: Question 14.35b Solution Manual Error?

Postby Nick Lewis 4F » Wed Feb 26, 2020 11:46 pm

this is currently 6N.1 and I completely agree. Only 1 mole of electrons was transferred and for K I ended up getting e^4.67, or 106.8

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