The protonation behaviour of Tris(hydroxy methyl)amino methane was investigated in water-pyridine mixtures up to 30 wt% pyridine using the cell Pt, H2(g, 1 atm) Tris HCl(m1)Tris(w2)AgCl(5)Ag in solvent mixture at 30°C. The pKBH+of Tris H+decreases gradually with increasing composition of pyridine and this variation has been rationalised in terms of solute-solvent interactions in these mixtures through the relation ApK = pKBH+(s)— pKBH where the subscriptss and w represent the solvent mixture and water respectively and AGf°’s represent the Gibbs energies of transfer of the various species from water to water-pyridine mixtures. © 1992, Taylor &amp; Francis Group, LLC. All rights reserved.

Chatty Kalidas

Liquids

Mixtures

Silver

Silver compounds

Thermodynamic properties

Gibbs free energy

Protonation

SOLUTE SOLVENT INTERACTIONS

STANDARD POTENTIALS

TRIS(HYDROXYMETHYL) AMINO

WATER PYRIDINE MIXTURES

Organic compounds

IIT Madras is a public technical and research university located in Chennai, Tamil Nadu. Founded in 1959, it is recognised as an Institute of National Importance.

IIT Madras has been ranked as the top engineering institute in India for four years in a row by the National Institutional Ranking Framework of the MHRD

It currently offers undergraduate, postgraduate and research degrees across 16 disciplines in Engineering, Sciences, Humanities and Management. About 596 faculty belonging to science and engineering departments and centres of the Institute are engaged in teaching, research and industrial consultancy.

IIT Madras

Standard potentials of silver, silver chloride electrode and protonation of tris (hydroxy methyl) amino methane in water-pyridine mixtures

Physics and Chemistry of Liquids

The preferential solvation of copper(II) salts, namely acetate, benzoate and iodate, has been studied in water-pyridine and water-dimethyl sulphoxide (DMSO) mixtures at 30°C by Gibbs energies of transfer and solvent transport number measurements. While the solubility of copper(II) acetate and copper(II) iodate in water-pyridine mixtures increases up to the pyridine mole fraction Xpy = 0.1, and then decreases, the solubility of copper(II) benzoate increases continuously with the addition of pyridine up to the pure solvent. In the case of water-DMSO mixtures, the solubilities of copper iodate and copper benzoate increase, whereas that of the acetate decreases continuously with the addition of DMSO. The Gibbs energy of transfer of the Cu2+ ion is negative and decreases continuously with the addition of pyridine or DMSO, while that of the acetate, benzoate and iodate anions is positive and increases continuously in both the solvent mixtures. These results, along with the solvent transport number Δ of pyridine or DMSO, have been interpreted in terms of heteroselective solvation of the salts, with the Cu2+ ion being preferentially solvated by pyridine or DMSO and the anions by water in water-pyridine and water-DMSO mixtures respectively. © 1989.

Fluid Phase Equilibria

Preferential solvation of copper(II) salts in water-pyridine and water-dimethyl sulphoxide mixtures

The standard potentials of Ag-AgCl electrodes In water-dlmethylformamlde (DMF) mixtures in the composition range 10–70 wt % DMF have been determined at four different temperatures from 15 to 30 °C by emf measurements using the cell Pt,H2(g, 1 atm)|HCl(m),DMF(x)-H2O(y)|AgCl-Ag. The primary medium effects and the mean molal activity coefficients in the concentration range 0.01-0.02 mol kg-1at 25 °C have been evaluated. The standard molal potentialaE°m has been expressed as a function of temperature. The thermodynamic parameters for the transfer of HCI from water to water-DMF mixtures have been evaluated from emf data at 25 °C on the mole fraction scale. The transfer energies of hydrogen and chloride Ions have also been determined by employing the tetraphenylarsonlum tetraphenylborate (TATB) reference electrolyte method. The significance of the various thermodynamic quantities associated with the transfer process has been discussed. © 1987, American Chemical Society. All rights reserved.

Journal of Chemical and Engineering Data

Thermodynamics of Transfer of Hydrogen Chloride in Water—Dimethylformamide Mixtures from Electromotive Force Measurements

Journal of Business Communication

Book Reviews : Fat Paper, Diets for Trimming Paperwork. Lee Grossman, New York, McGraw-Hill Book Company, 1976, 160 pages, $9.95. Information, Communication, and the Paperwork Explosion. Trevor J. Bentley. London, McGraw-Hill Book Company (UK), Ltd., 1976, 192 pages, $12

Journal of Solution Chemistry

Transfer activity coefficient of the proton in water-pyridine mixtures. A comparison of some extrathermodynamic assumptions

Analytical Chemistry

Transfer energies and solute-solvent effects in the dissociation of protonated tris in N-methylpropionamide-water solvents

Journal	Physics and Chemistry of Liquids
ISSN	00319104
Open Access	No