The model representation of electrolyte solutions with two-component solvents and mass spectrographic determination of enthalpy change at solvation of Na+Etm(H2O)n ion clusters by ethanol molecules in water–ethanol solvent Original Research Article

Considering liquid as a set of potential wells (Frenkelʹs conception), the experimental distribution of sodium ions with respect to a degree of solvation with water and ethanol molecules in water–ethanol solvent can be satisfactorily described by a polynomial (pa+pb+q)k (pa and pb are the probabilities of occupancy of one of the k equivalent potential wells near the ion by a water or an ethanol molecule, respectively; q=1−pa−pb). Basing on the mass spectrographic data, it is shown that values of enthalpy changes, ΔHm,m+f, for 50 reactions of solvation of ion clusters Na+Etm(H2O)n with f ethanol molecules in solution (f=1,2,…,5) are satisfactorily described by the dependence (−ΔH)=C(n,f)exp[−α(n)m] for most reactions.