Abstract
The refractive indices and the densities of (1) protic-protic solvent mixtures (ethanol-n-propanol, ethanol-n-butanol and n-propanol-water), (2) aprotic-aprotic solvent mixtures (DMSO-DMF, DMSO-DI (1,4-dioxane) and DMF-DI) and (3) aprotic-protic solvent mixtures (DMSO, DI-methanol, ethanol, n-propanol and n-butanol) were measured experimentally at different temperatures. From the values of the measured refractive indices and the densities, the excess refractive indices, the atomic polarizations, the molar refractions, the molar volumes, the solvated radii and the polarizabilities of the mentioned mixed solvents were calculated and discussed. The results showed that, the solvent-solvent interaction reaches maximum value at definite mole fraction of each solvent depending on the nature of the solvent. Also the excess refractive indices, the densities and the atomic polarizations were found to decrease as the temperature increase. On the other hand, the molar volumes, the solvated radii, the molar refractions and the polarizabilities were found to increase as the temperature increases.
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