A volumetric investigation of solvophobic effects in halide-n-alkanol-n-alkane ternary systems

The density of solutions in the methanol-heptane-sodium chloride and ethanol-octane-lithium chloride systems was measured at 298.15 K using a vibratory densimeter. From the experimental data, apparent and partial molar volumes were calculated accurate to 0.01 cm3/mol. It was shown that volume properties versus composition dependences behave extremely. This behavior was attributed to restructuring of the solutions, namely, to a closer packing of molecules of the alkanol-alkane mixed solvent at an alcohol mole fraction of 0.95. It was shown that, for larger hydrocarbon residues in both components of the mixed solvent, the extremum in the volume properties does not disappear and holds its position.