Sample Problem 21.3
Calculating an unknown Eohalf-cell from Eocell
PLAN:
SOLUTION:
Calculate Eobromine given Eozinc = -0.76 V
The reaction is spontaneous as written since the Eocell is (+). Zinc is being oxidized and is the anode. Therefore the Eobromine can be found using Eocell = Eocathode - Eoanode.
Eocell = Eocathode - Eoanode = 1.83 = Eobromine - (-0.76)
Eobromine = 1.86 - 0.76 = 1.07 V
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