It calculates change in potential as R T over n F times the natural log of the reaction quotient.
One extension of this equation is used to model diffusion through soil and is named for Planck. If a significant current density is present, the resulting overpotential deviation from the value predicted by this equation can be calculated using the Tafel equation. In the limit of low ion concentration, this equation predicts an infinite voltage drop, and it can be used to calculate the electrical potential of a cell membrane; the modification used to do so is named for Goldman. It calculates change in potential as R T over n F times the natural log of the reaction quotient. For 10 points, name this equation that gives the electromotive force for a chemical cell.
One extension of this equation is used to model diffusion through soil and is named for Planck.
Nernst equation