Volumetric, viscometric and ultrasonic study of amino acids in mixed solvents at varying temperature

Densities (ρ), viscosities (η) and ultrasonic speeds (u), for solutions of (0.02, 0.04, 0.06, 0.08 and 0.10 M) L - Valine (Val), L - isoleucine (Ile) and L - Proline (Pro) in aqueous 1, 3 - dioxolane (10 % w/w) at 298.15, 303.15, 313.15 and 323.15K have been determined. These data have been used to calculate apparent molar volumes (φv), limiting apparent molar volume (φv°) and the slope (Sv), apparent molar compressibility (φk), limiting apparent molar compressibility (φk°) and the slope (Sk), Falkenhagen and Jones–Dole coefficients, A and B, respectively. These parameters were used to discuss the solute–solute and solute–solvent interactions and also the effect of cosolvent (1, 3 - dioxolone) on these interactions.