So H two A will react in water to produce hydronium and our conjugate base. Now let's look at this conjugate base. This conjugate base can either go two ways. It can either act as a conjugate base, taking this H back and creating back our acid, or it can act as an acid itself and it can react with water to produce a second hydronium ion and the final conjugate base. Now, the same way we spoke about Ka or acidization constants for monoprotic acids, we can also talk about Ka's about polyproteic acids. Except now we're not going to have one Ka.