This chemistry video tutorial explains how to use the nernst equation to calculate the cell potential of a redox reaction under non standard conditions. This video is very useful for students taking ap chem. It contains plenty of examples and practice problems with step by step solutions. This tutorial explains how to find n and how to use le chatelier's principle to determine the cell potential is going to increase or decrease when the concentration of the reactants and products changes. This lesson also contain examples of calculating the pH of a redox reaction given cell potential and how to find the unknown concentration of a reactant or product ion dissolved in the aqueous phase by finding the reaction quotient Q. This video tutorial also mentions how to derive the nernst equation from delta G and how to change the natural log function into log Q using the change of base formula. This video provides 2 versions of the nernst equation one of which is useful when given a temperature other than 25C or 298K.