Partial molal volumes of ions in organic solvents from ultrasonic vibration potential and density measurements. I. Methanol

Abstract

The partial molal volumes of monovalent ions in methanol have been obtained from ultrasonic vibration potential and density data for solutions of uni-univalent electrolytes. The ionic partial molal volumes are found to be smaller in methanol than in water. The use of Hepler's equation has permitted us to estimate the geometric and electrostrictive contributions to the partial molal volumes of ions in methanol. The electrostriction appears to be larger for tetraalkylammonium ions than for alkali metal and halide ions. Also, the electrostriction of ions has been found to be larger in methanol than in water. These results are explained in terms of differences in the content of the solvation layer of ions in methanol. The void space around ions appears to be smaller in methanol than in water.

Density of Methanolic Alkali Halide Salt Solutions by Experiment and Molecular Simulation

“…An exceptional case is LiI where deviations up to 0.17 % from the data of Renz 56 were found at the highest investigated Figure 3, these data possess an increasing mismatch both to the present experimental data and the remaining literature data. [47][48][49][50]52,53,58,61,62 The deviation between these other data and the present experimental data is below 0.1 %. Furthermore, a deviation up to 0.13 % from the data of Werblan 54 64 increases up to 1.63 % at the highest concentration, whereas the deviation from the data of The density of the electrolyte solutions ρ increases linearly with the ion mole fraction x i for a given temperature in the concentration range studied in this work (cf.…”

Ultrasonic Vibration Potentials

“…--~~~~6 data in this soivent (12) . In reference 12 a single l ine w as drawn through the data from which were obtained the values of A and B given in Table V III. _ _ _ _ -------------~~-----------~~-------------- …”

“…For a rather qualitative discussion restricted to the alkali meta l and halide ions it is sufficient (12)(13)(14)(15)(16) …”

Acoustical and viscometric studies of buspirone hydrochloride with cobalt(II) and copper(II) ions in aqueous medium

“…The present studies can help in the thermodynamic interpretation of molecular interactions involving Buspirone Hydrochloride with aqueous metal ion solutions. Thus data on such pharmaco-phores may be quite useful in interpreting the pharmacokinetics & pharmacodyanimcs path where several life essential metal ions are present as electrolytes [10][11][12].…”

“…The present studies can help in the thermodynamic interpretation of molecular interactions involving Buspirone Hydrochloride with aqueous metal ion solutions. Thus data on such pharmaco-phores may be quite useful in interpreting the pharmacokinetics & pharmacodyanimcs path where several life essential metal ions are present as electrolytes [10][11][12].In the present paper, densities, viscosities and ultrasonic velocities of ternary systems of buspirone hydrochloride drug (0.01-0.10 M) in aqueous Cobalt chloride/Copper chloride (0.1, 0.05 and 0.025 M) were measured. From the experimental data obtained, a number of thermodynamic parameters such as-isentropic compressibility, intermolecular free length, specific acoustic impedance, relative association, free volume, internal pressure, viscous relaxation time, Gibb's free energy, attenuation coefficient, Rao's constant, Wada's constant, Falkenhagen coefficient A and Jone-Dole or viscosity B-coefficient have been calculated.…”