Difference way to express structure of liquid systems with one chemical balance is offered. The equation of concentration dependence of empirical balance constants is proved by decomposition of Gibbs function in multiple sedate Taylor number. The authors calculate constant parameters of mathematical model for six systems with reaction of etherification with the help of MLS. The given mistakes of the used model are also calculated.

Key words: liquid systems, equilibrium constant, mathematical model, generalized parameters, given mistake.