Now, this guy is at equilibrium is when our reaction is at equilibrium. And if our reaction has reactants A and b and C and D which are all in an Aqueous state, then our equilibrium constant expression is the following if k equals the ratio of the concentration of products divided by the ratio of the concentration of reactants. Now, to begin our process of adjusting for the new relationship between the concentration and the cell potential, let's look at gives free energy. Now, under nonstandard state conditions we can make an adjustment to gifts free energy formula. Remember, before under standard state conditions our formula was the following. It was simply gifts free energy or change in gifts free energy under standard state conditions is equal to negative of this guy.