Abstract
The solubility of benzoic acid in (acetic acid + water) and (acetic acid + toluene) binary mixtures has been investigated by the gravimetric method. The study was carried out at different mass fractions of acetic acid ranging from 0.1 to 0.8 at 299.15 K. The results indicated that the solubility of benzoic acid in both binary mixtures exhibited an increasing trend with an increase in the mass fraction of acetic acid. The solubility of benzoic acid with respect to acetic acid in the (acetic acid + water) mixture was less than that in the (acetic acid + toluene) mixture. Furthermore, the refractive indices, nD, and densities, ρ, have been measured for (acetic acid + water) and (acetic acid + toluene) binary mixtures as well as mixtures saturated with benzoic acid salt at different temperatures over the entire composition range, and the same have been reported. The molar refractivity, Rm, was estimated using refractive index, nD, and molar volume, Vm, employing the Lorentz–Lorenz equation. The excess propert...
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