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Chemistry
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Ag+(aq) + e → Ag(s)     (Eored = 0.800 V)
Fe3+(aq) + 3e → Fe(s)     (Eored = -0.036 V) 

What is the voltage generated by this cell? (Eocell).

0.836 V

Calculate Ecell at 25°C when [Ag+(aq)] = 0.049 M and [Fe3+(aq)] = 3.1 M.

Mar 20th, 2015

E cell = E^0 cell - (RT/nF) log([Fe3+]/[Ag+]), 

where R = 8.134 J/(K mol); T = 25 + 273 = 298 K; n = 3 (number of electrons transferred); F = 96500 C/mol

E cell = 0.836 - (8.134 * 298)/(3*96500) log(3.1/0.049) = 0.836 - 0.035 = 0.80 V

Mar 20th, 2015

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Mar 20th, 2015
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Mar 20th, 2015
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