Studies on molecular interactions of oxalic acid and its salts in co-aqueous solutions of 1,3-dioxolane by volumetric and viscometric measurements at TÂ =Â (298.15, 308.15, and 318.15) K

The densities and viscosities of oxalic acid and its salts, viz. ammonium oxalate, sodium oxalate and potassium oxalate, have been determined in w1 = (0.05, 0.10, and 0.15) mass fraction of 1,3-dioxolane (1) + water (2) mixtures at T = (298.15, 308.15, and 318.15) K and p = 0.1 MPa. Apparent molar volumes (Vϕ), viscosity B-coefficients of these electrolytes were obtained from their densities, viscosities. The limiting apparent molar volumes (Vϕ0) and experimental slopes (Sv⁎) derived from the Masson equation and the obtained parameters have been interpreted in terms of ion-solvent and ion-ion interactions, respectively. The viscosity data were evaluated by using the Jones-Dole equation. The structure-making/-breaking capacities of the electrolytes have been inferred from the sign of (δ2Vϕ0δT2)Pand dB/dT. The activation parameters of viscous flow for the ternary solutions studied were also calculated and explained by the application of transition state theory.