Now, on the bottom, since we have an Ha in the Aqueous state, our conjugate acid, we must include the conjugate acid as well. So Ha gets incorporated into our equilibrium constant expression. Now, what is a k value or Ka value? Well, the ionization constant is simply a ratio from a mathematical perspective. And what the Ka is, it's the amount of product formed over the amount of reactants left over. So if this number is very large, then that means a lot of product was formed and very little reactants left over.