  The analytical solution of the recently proposed ideal chain polymer
mean-spherical approximation (Yu.Kalyuzhnyi, Mol.Phys., 94, 735(1998)) is
presented for the multicomponent mixture of charged hard-sphere linear chain
flexible molecules. The solution apply to any mixture of chain molecules with
arbitrary distribution of the charge and size of the beads along the molecular
backbone. Closed form analytical expressions for the internal energy, Helmholtz
free energy, chemical potentials and pressure are derived. By way of
illustration thermodynamical properties of several versions of the fluid of
charged chain molecules of different length, including the molecules with
uniform, diblock and alternating distribution of the charge are studied.
Theoretical predictions are in reasonable agreement with available computer
simulation predictions. We present also the liquid-gas phase diagrams for the
systems with diblock and alternating distribution of the charge.
