Apparent molar volumes (ϕ V ) and viscosity B coefficients for l-alanine in (0.005, 0.010, 0.015, and 0.020) mol · dm −3 aqueous silver sulphate (Ag 2 SO 4 ) solutions were determined from the solution density and viscosity measurements at (298.15, 308.15, and 318.15) K as a function of amino acid concentration. The standard partial molar volumes (ϕ 0 V ) and experimental slopes (S * V ) obtained from the Masson equation were interpreted in terms of solute-solvent and solute-solute interactions, respectively. To analyze solution viscosities in terms of viscosity B coefficients, the Jones-Dole equation was applied. The structure-making or -breaking ability of the amino acid has also been discussed in terms of the sign of (δ 2 ϕ 0 V /δT 2 ) P . The activation parameters of viscous flow for the ternary solutions were also derived and explained in terms of transition state theory.

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Apparent molar volumes (φ V ) and viscosity B-coefficients for some carbohydrates (D-glucose, D-mannitol, and D-sucrose) in (0.001, 0.003, and 0.005) mol • kg -1 aqueous cetrimonium bromide (N-cetyl-N,N,N-trimethyl ammonium bromide) (C 19 H 42 BrN) solutions have been determined from solution density, F, and viscosity, η, measurements at (298.15, 308.15, and 318.15) K as a function of the concentration of carbohydrates. The limiting apparent molar volume (φ V 0 ) and experimental slopes (S V *) obtained from the Masson equation have been interpreted in terms of solute-solvent and solute-solute interactions, respectively. The viscosity data were analyzed using the Jones-Dole equation, and the derived parameters A and B have also been interpreted in terms of solute-solute and solute-solvent interactions, respectively, in the mixed solutions. The structuremaking or -breaking ability of carbohydrates has been discussed in terms of the sign of (δ 2 φ V 0 /δT 2 ) P as well as dB/dT. The three-dimensional representation of the investigated molecules concerned with this paper is shown below for a better understanding.

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Electrical conductances of tetraalkylammonium iodides, R4NI (R = butyl to heptyl), in different mass % (20 to 80) of carbon tetrachloride (CCl4) + nitrobenzene (PhNO2) have been measured at 298.15 K. Limiting molar conductances Λ0, association constants K A, and cosphere diameter R for ion pair formation in the mixed solvent mixtures have been evaluated using the Lee−Wheaton conductivity equation. However, the deviation of the conductometric curves (Λ versus √c) from linearity for the electrolytes in 80 mass % of CCl4 + PhNO2 indicated triple ion formation, and therefore corresponding conductance data have been analyzed by the Fuoss−Kraus theory of triple ions. Limiting ionic molar conductances λ0 ± have been calculated by the reference electrolyte method along with a numerical evaluation of ion pair and triple ion formation constants (K P ≈ K Aand K T); the results have been discussed in terms of solvent properties and configurational theory.