Now, why is that useful? Why is it helpful to have the acid and its conjugate base? Well. Because if we begin to add H plus ions into our mixture because of some type of acid based reaction that takes place inside that solution, then the conjugate base that exists in the water can basically interact and consume some of those H plus ions, and that will decrease the amount of H plus ions in our mixture. And what that does is it creates a gradual change in PH instead of a drastic change in PH. And so if we examine the Titration curve for a buffering system, for example, if our acid is acetic acid and the conjugate base is acetate ion, we get the following curve as seen in this graph.