A variant of this equation in (*)  biochemistry only considers sodium, potassium, and chlorine ions and includes a coefficient of 61.5 millivolts across the plasma membrane.
For ideal solutions, a form of this statement can be derived simply by summing the LewisÂ–Randall rule over every species. Arnold Beckman's original pH meter worked by solving this equation for proton concentration. The discoverer of this equation invented a better incandescent lamp than Thomas Edison's and won a Nobel Prize for discovering the Third Law of Thermodynamics. A variant of this equation in (*)  biochemistry only considers sodium, potassium, and chlorine ions and includes a coefficient of 61.5 millivolts across the plasma membrane. This equation predicts that free energy depends on RT times the log of the reaction quotient, but first divides each term by nF to get units of volts. For 10 points, name this equation that gives the redox potential of a galvanic cell.
For ideal solutions, a form of this statement can be derived simply by summing the LewisÂ–Randall rule over every species.
Nernst  equation