Nernst Equation for EMF of a Cell
EMF (E) = — V
How to use this calculator
Enter the standard EMF of the cell, temperature in Kelvin, number of electrons involved in the redox reaction, and the reaction quotient (Q). The calculator will automatically compute the EMF of the cell using the Nernst equation.
What this calculator is used for
This calculator helps determine the actual EMF (electromotive force) of an electrochemical cell under non-standard conditions using the Nernst equation.
Formula
E = E0 - (0.0591 / n) * log10(Q) at 298 K
More generally: E = E0 - (RT / nF) * ln(Q)
Example
Given:
E0 = 1.10 V
T = 298 K
n = 2
Q = 10
EMF (E) = 1.10 - (0.0591 / 2) * log(10) = 1.10 - 0.02955 = 1.07045 V
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