Using the Nernst Equation to Calculate Ecell
Calculating Q:
Q = = = 4.8 x 10-4
(PH2)[Zn2+]
[H+]2
(0.30)(0.010)
(2.5)2
Solving for Ecell at 25oC (298 K), with n = 2:
Ecell = Eocell - log Q = 0.76 V - log (4.8 x 10-4
0.0592 V
n
0.0592 V
2
Ecell = 0.76 V - (-0.098 V) = 0.86 V
| Previous slide | Next slide | Back to first slide | View graphic version |