The following values may be useful when solving this tutorial. Part A In the act
ID: 859083 • Letter: T
Question
The following values may be useful when solving this tutorial.
Part A
In the activity, click on the E?cell and Keq quantities to observe how they are related. Use this relation to calculate Keq for the following redox reaction that occurs in an electrochemical cell having two electrodes: a cathode and an anode. The two half-reactions that occur in the cell are
Cu2+(aq)+2e??Cu(s) and Co(s)?Co2+(aq)+2e?
The net reaction is
Cu2+(aq)+Co(s)?Cu(s)+Co2+(aq)
Use the given standard reduction potentials in your calculation as appropriate.
Constant Value E?Cu 0.337 V E?Co -0.277V R 8.314 J?mol?1?K?1 F 96,485 C/mol T 298 KExplanation / Answer
Cu2+(aq) + Fe(s) => Cu(s) + Fe2+(aq)
Eo(cell) = Eo(Cu2+/Cu) - Eo(Fe2+/Fe)
= 0.337 - (-0.440) = 0.777 V
Molar gas constant R = 8.314 J/mol.K
Temperature T = 298 K
Moles of electrons transferred n = 2
Faraday constant F = 96485 C/mol
Delta Go = -nFEo(cell) = -RT ln Keq
Equilibrium constant Keq = exp(nFEo(cell)/RT)
= exp(2 x 96485 x 0.777/(8.314 x 298))
= 1.92 x 10^26 ( = 1.92 x 1026)
Related Questions
drjack9650@gmail.com
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.