Solubilities of l-glutamic acid, 3-nitrobenzoic acid, p-toluic acid, calcium-l-lactate, calcium gluconate, magnesium-dl-aspartate, and magnesium-l-lactate in water

Solubilities of l -glutamic acid, 3-nitrobenzoic acid, p -toluic acid, calcium- l -lactate, calcium gluconate, magnesium- dl -aspartate, and magnesium- l -lactate in water were determined in the temperature range 278 K to 343 K. The apparent molar enthalpies of solution at T = 298.15 K as derived from these solubilities are Δ sol H m ( l -glutamic acid, m sat = 0.0565 mol · kg − 1 ) = 30.2 kJ · mol − 1 , Δ sol H m (3-nitrobenzoic acid, m = 0.0188 mol · kg − 1 ) = 28.1 kJ · mol − 1 , Δ sol H m ( p - toluic acid, m = 0.00267 mol · kg − 1 ) = 23.9 kJ · mol − 1 , Δ sol H m (calcium- l -lactate tetrahydrate, m = 0.2902 mol · kg − 1 ) = 25.8 kJ · mol − 1 , Δ sol H m (calcium gluconate, m = 0.0806 mol · kg − 1 ) = 22.1 kJ · mol − 1 , Δ sol H m (magnesium- dl -aspartate tetrahydrate, m = 0.1469 mol · kg − 1 ) = 11.5 kJ · mol − 1 , and Δ sol H m (magnesium- l -lactate trihydrate, m = 0.3462 mol · kg − 1 ) = 3.81 kJ · mol − 1 .