Determination of a Linear Rule between the Osmotic Coefficients on Mole Fraction Base and Several Different Concentration Expressions in Single Electrolyte Solutions

In the presented paper, a linear rule between the osmotic coefficients on mole fraction base and each of several concentration expressions is presented, respectively, in the single electrolyte solutions which include various valence, such as uniuni-, biuni-, triuni-, tetrauni-, bibi-, and tribi-valence inorganic acids, alkalies and salts. Based on the rule, a thermodynamic model is developed and successfully applied to these electrolyte solutions to predict and reproduce their conventional osmotic coefficients, and other properties, like the relative molal vapor pressure lowering, the equivalent conductivity, solubility, even the association effects of ions. The examples with satisfied results have been given.