An Analytical Calculation of the Equation of State and the Critical Point in a Dense Classical Fluid of Charged Hard Spheres

A theoretical expression for the equation of state is developed which is based on the mass action law, the Carnahan-Starling expression for the hard-sphere contributions and the mean-spherical approximation for the Coulombic interactions. Numerical calculations of the pressure and the critical data show good agreement with other methods (HNC, MC etc.).