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Density(ρ)and viscosity(η)are measured for glycine,DL-α-alanine DL-α-valine,and DL-α-leucine in 0.05,0.10,0.15 and 0.20 mol·L-1aqueous metformin hydrochloride at 308.15,313.15 and 318.15 K.The measured values are used to estimate some important parameters,such as partial molal volume Vφ,standard partial molal volume0Vφ,transfer volume 0 ΔVφ,hydration number nH,the second derivative of infinite dilution of partial molal volume with respect to temperature,viz.,2 0 2 Vφ /T,viscosity B-coefficient,variation of B with temperature,viz., dB/dT,free energy of activation per mole of solvent0 * 1 Δμand solute 0* 2 Δμof the amino acids.These parameters are interpreted in terms of solute-solute and solute-solvent interactions and structure making/breaking ability of solutes in the given solution.In addition,0Vφ, 0 ΔVφ,viscosity B-coefficient,ΔB and 0* 2 Δμare split into group contributions(3NH COO +-)and CH2 of the amino acids using their linear correlation and their behavior is discussed.
Density (ρ) and viscosity (η) were measured for glycine, DL-α-alanine DL-α-valine, and DL-α-leucine in 0.05, 0.10, 0.15 and 0.20 mol·L-1a aqueous metformin hydrochloride at 308.15, and 318.15 K. The measured values are used to estimate some important parameters, such as partial molal volume Vφ, standard partial molal volume 0Vφ, transfer volume 0 ΔVφ, hydration number nH, the second derivative of infinite dilution of partial molal volume with respect to temperature , viz., 2 0 2 Vφ / T, viscosity B-coefficient, variation of B with temperature, viz., dB / dT, free energy of activation per mole of solvent0 * 1 Δμand solute 0 * 2 Δμof the amino acids These parameters are interpreted in terms of solute-solute and solute-solvent interactions and structure making / breaking ability of solutes in the given solution. In addition, 0Vφ, 0ΔVφ, viscosity B-coefficient, ΔB and 0 * 2 Δμare split into group contributions (3NH COO + -) and CH2 of the amino acids using their linear correlation and their beh avior is discussed.