Calculate cell membrane potential instantly with our free Nernst equation calculator. Input temperature, ion charge & concentrations for precise electrochemical results.
Calculate the electric potential in a cell using the Nernst equation.
The Nernst equation relates the reduction potential of a cell to the standard cell potential, temperature, and the reaction quotient.
RT/zF = (8.314 × 310.15) / (1 × 96485) = 0.026725
ln([ion]out/[ion]in) = ln(145/12) = 2.491827
(RT/zF) × ln([ion]out/[ion]in) = 0.026725 × 2.491827 × 1000 = 66.59 mV
E = 0 - 66.59 = 0.00 mV
A zero potential indicates that the system is at equilibrium.
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