It has been experimentally determined refractive index of binary liquid mixtures toluene with n-pentane, n-hexane, n-heptane, cyclohexane and ethanol at ± 0.02 c 25.00 c. using precision refractometer Bausch & Lomb. The molar fraction of the more volatile component is determined with an accuracy of ± 0.0005 accuracy. The refractive index of each bit is set to polynomial equations by the method of least squares, based on the molar fraction of the more volatile component.

It has been experimentally determined refractive index of binary liquid mixtures toluene with n-pentane, n-hexane, n-heptane, cyclohexane and ethanol at ± 0.02 c 25.00 c. using precision refractometer Bausch & Lomb. The molar fraction of the more volatile component is determined with an accuracy of ± 0.0005 accuracy. The refractive index of each bit is set to polynomial equations by the method of least squares, based on the molar fraction of the more volatile component.