3. Models derived from solving integral equations

3.1 Models for representing electrolyte solutions

One of the main assumptions of Debye-Hückel theory concerns the expression of the local distribution of charges relative to each other, commonly referred to as the radial distribution function. In DH theory, this is expressed in terms of a Boltzmann factor of electrostatic energy (equation (28) ). An improvement to the theory involves modifying this expression to take account of ion size. Ions in solution can be modeled as a system of charged hard spheres. When all ions are assumed to have the same diameter,...