Chemical equilibrium in non ideal solutions classical theory

1 Chemical equilibrium in non ideal solutions classical theory 

The correct expression of the chemical equilibrium and the corresponding mass action law in solution requires the minimization of the full free enthalpy of the solution, which includes the solvent contribution [24], We need to minimize the free energy of the solute pair formation equilibrium 

The excess free energy and osmotic coefficient p can be computed for the Coulomb [21] and hard sphere parts at the MSA level, we have 

Subject to the constraints imposed by material the balance relations 

They are essentially the chemical potentials and lead to the mass action law 

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