The equilibrium constant, K, for a redox reaction is related to the standard pot

Question

The equilibrium constant, K, for a redox reaction is related to the standard potential, E, by the equation lnK=nFERT where n is the number of moles of electrons transferred, F (the Faraday constant) is equal to 96,500 C/(mol e) , R (the gas constant) is equal to 8.314 J/(molK) , and T is the Kelvin temperature.

Part B

Calculate the standard cell potential (E) for the reaction

X(s)+Y+(aq)X+(aq)+Y(s)

if K = 4.72×103.

Express your answer to three significant figures and include the appropriate units.

Explanation / Answer

lnK= nFE/RT

ln(4.72*10-3)= 1*96500*E/(8.314*298.15)

-5.35= E*38.93

E= -5.35/38.93=-0.13758V

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