Ultrasonic Studies of Some Mono-, Di-, and Tri-Saccharides in Aqueous Sodium Acetate Solutions at Different Temperatures

摘要

Standard partial molar isentropic compressibilities, K_(s,2)° at infinite dilution of some mono-, di- and trisaccharides were determined in water and in (0.5, 1.0, 2.0 and 3.0)molkg~(-1) aqueous sodium acetate solutions at temperatures, T = (288.15, 298.15, 308.15 and 318.15) K from precise speed of sound measurements. From these data, the standard partial molar isentropic compressibilities of transfer, △_t/K_(s,2)°, pair and triplet interaction coefficients (K_(AB), K_(ABB)) and hydration numbers, N_w have been calculated. These parameters have been discussed in terms of various molecular interactions occurring in solutions. Effect of sodium acetate on the taste quality of various saccharides has been discussed on the basis of apparent massic volume and apparent massic isentropic compressibility parameters. Acoustical properties have also been discussed in relation to previously reported volumetric and rheological studies for these systems.