The Macroscopic and Microscopic Free Energies of Solvation of Silver Chromate and Silver Phosphate in Some Organic Solvents at 298.15K

The macroscopic free energies of solvation of silver chromate and silver phosphate in different solvents, acetonitrile (AN), N-methylformamide (NMFA), N-N, dimethylformamide (DMFA), propylene carbonate (PC), dimethyl suphoxide (DMSD), N-methyl-pyrrolidone (NMePy) and ethanol (ETOH) were estimated from the experimental solubility measurements at 298.15K. The macroscopic free energies G(Ma) and free energy of transfer Gt (Ma) for Ag2CrO4 and Ag3PO4 in the organic solvents represent the macroscopic part of the free energies. The macroscopic free energies for both electrolytes were evaluated experimentally and compared with the microscopic free energies which calculated theoretically. The microscopic free energies of solvation of silver chromate and silver phosphate in the used solvents were theoretically calculated, which are the cavity, the lennard Jones, the induced, the volume and the dipole-dipole free energies and not only electrostatic energy as explained before. The macroscopic and microscopic free energies were compared and discussed.