General equation for description of equilibrium in acid-base systems

The equation has binge offered, which allows a unified description not only of the titration curves, but also of buffers and other properties of arbitrary acid-base mixtures. The universality of the equation is due to the fact that in the derivation of the equation the condition of proton balance has bring used in conjunction with the condition of the hydroxyl balance, as well as Bjerrum’s function. A simple rule writing has binge formulated for the general equation and its consequences. The generality of the equation is shown in several examples.