The effect of temperature on the solubility of benzoic acid derivatives in water
2006
Abstract Using a laser monitoring observation technique, solubilities of o -nitro-benzoic acid, p -hydro-benzoic acid, p -methyl-benzoic acid and m -methyl-benzoic acid in water have been measured in the temperature range 290.15–323.15 K. The experimental data are regressed with the Wilson equation and the λH equation. The experimental results show that solubilities of these compounds in the range of 10 −4 –10 −5 mole fraction in water, increase significantly with temperature. Except for o -nitro-benzoic acid, the solubility data are described adequately with the Wilson equation. The λH equation gives good agreement with all experimental data. The results indicate that the molecular structure and interactions affect the solubilities significantly.
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