So let's begin with the dissociation equation for this particular acid. So let's suppose we use some hypothetical acid, Ha, and it dissociates into H plus ions and its conjugate base. Now, from chemistry, we know that the equilibrium constant expression for this equation is given by this expression. So the acid association curve Ka is equal to the product of the concentration of these two products divided by the concentration of that acid. So this is the acid that we're using in our buffer system, and this is its conjugate base. Now let's take the log of both sides.