Volumetric properties of aqueous solutions of aluminium-l-lactate

• Densities of aqueous solutions of aluminium-l-lactate were determined.
• The cubic expansion coefficients, the apparent molar volumes were evaluated.
• Derivatives of volume with respect to T indicated the changes in structure of water.

Densities of aqueous solutions of aluminium-l-lactate <0.72 mol·kg−1, were measured at T = 5 K intervals, from T = (278.15 to 343.15) K. These densities served to determine the apparent molar volumes, the cubic expansion coefficients and the second derivatives of volume with respect to temperature which are interrelated with the derivatives of isobaric heat capacities with respect to pressure. Changes in the volumetric properties as a function of temperature and concentration of aluminium-l-lactate, are discussed in terms of changes in the structure of water.