So, to see what we mean from a mathematical perspective, let's take a look at the following equation. So basically, what we want to derive is an equation known as the Henderson Hasselbalk equation that you should be familiar with because it comes from general chemistry. So basically, this equation is convenient when we're trying to determine the buffet systems that we want to use. 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.