Volumetric and acoustic properties of d-mannitol in aqueous sodium or magnesium chloride solutions over temperature range of 293.15–313.15 K

Apparent molar volumes and apparent molar compressibilities for d-mannitol in (1, 5 and 10) % aqueous sodium or magnesium chloride have been determined from solution density measurements at T = (293.15, 298.15, 303.15, 308.15, 310.15, and 313.15) K and sound velocity measurements at T = (293.15 and 310.15) K as a function of the concentration of sugar alcohol. The limiting apparent molar volumes and limiting apparent molar compressibilities have been obtained from the Masson equation. The corresponding transfer parameters and expansion coefficients were also estimated. These parameters have been discussed in terms of d-mannitol–cosolute (NaCl or MgCl2) interactions in aqueous solutions and thus used to understand the mixing effects due to these interactions.

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► The interactions of d-mannitol in aqueous and NaCl or MgCl2 solutions were studied.
► d-Mannitol behaves as a structure breaker in aqueous and aqueous salt solutions.
► The hydration of d-mannitol decreases with increasing temperature.