PSEUDOLATTICE THEORY OF STRONG ELECTROLYTE-SOLUTIONS

The quadratic concentration dependence of the logarithmic activity coe fficient and relative partial molar enthalpies of concentrated strong electrolyte solutions can be explained by assuming the solution to hav e a pseudolattice structure and taking short-range interactions into a ccount through a hard-core potential with an attractive 1/r(6) tail. T he pseudolattice model is shown to reproduce the experimental data of activity coefficients and relative partial molar enthalpies with a gre at degree of accuracy over a large range of concentration. The validit y of the short-range potential is explicitly tested with experimental data for a number of substances. (C) 1997 American Institute of Physic s.