Ion solvation and water structure in potassium halide aqueous solutions

Cold neutron inelastic scattering experiments have been performed on dilute aqueous solutions of (CD 3 ) 3 COH and of solutions of (CH 3 ) 3 COH in D 2 O at 21 °C. From the broadening of the quasi-elastic peak and independently determined self-diffusion coefficients ( D ), diffusive lifetimes ( c ) of H 2 O molecules have been calculated as functions of solute concentration. The product Dc is insensitive to concentration, giving a mean diffusion step length of 0.14 nm. The inelastic portion of the spectrum, reflecting lattice-like hydrogen bonding modes indicates that the solute enhances the water ‘structure’ but that such structure bears no resemblance to ice.

Effect of tetraphenylphosphonium and tetraphenylborate ions on the water structure in aqueous solutions; FTIR studies of HDO spectra

Journal of the Chemical Society Faraday Transactions ◽

10.1039/a702354e ◽

1997 ◽

Vol 93 (19) ◽

pp. 3463-3466 ◽

Cited By ~ 29

Author(s):

Janusz Stangret ◽

Ewa Kamieńska-Piotrowicz

Keyword(s):

Aqueous Solutions ◽

Water Structure ◽

Ftir Studies

Ion Solvation and Water Structure in an Aqueous Sodium Chloride Solution in the Gigapascal Pressure Range

The Journal of Physical Chemistry Letters ◽

10.1021/acs.jpclett.0c03147 ◽

2020 ◽

pp. 250-256

Author(s):

Toshio Yamaguchi ◽

Nami Fukuyama ◽

Koji Yoshida ◽

Yoshinori Katayama

Keyword(s):

Sodium Chloride ◽

Chloride Solution ◽

Pressure Range ◽

Sodium Chloride Solution ◽

Water Structure ◽

Ion Solvation ◽

Aqueous Sodium Chloride Solution ◽

Aqueous Sodium

Heat capacity changes and standard partial molal heat capacities of aqueous solutions of some tetra-alkyl ammonium halides at 30°C and the effect on water structure

Transactions of the Faraday Society ◽

10.1039/tf9696502333 ◽

1969 ◽

Vol 65 (0) ◽

pp. 2333-2338 ◽

Cited By ~ 18

Author(s):

T. S. Sarma ◽

R. K. Mohanty ◽

J. C. Ahluwalia

Keyword(s):

Heat Capacity ◽

Aqueous Solutions ◽

Water Structure ◽

Heat Capacities ◽

Ammonium Halides ◽

Heat Capacity Changes ◽

Partial Molal Heat Capacities ◽

Alkyl Ammonium

Ionization of Water in Concentrated Potassium Halide Media

Australian Journal of Chemistry ◽

10.1071/ch00049 ◽

2000 ◽

Vol 53 (5) ◽

pp. 369 ◽

Cited By ~ 3

Author(s):

Faradj K. Samani ◽

Stephen G. Capewell ◽

Pal M. Sipos ◽

Peter M. May ◽

Glenn Hefter

Keyword(s):

Ionic Strength ◽

Aqueous Solutions ◽

High Precision ◽

Excellent Agreement ◽

Ion Pairs ◽

Formation Constants ◽

Glass Electrode ◽

Ionic Product ◽

Ionization Of Water ◽

Potassium Halide

The ionic product of water, pKw = –log[H+][OH–], has been determined as a function of ionic strength (I ) in concentrated aqueous solutions of KCl, KBr and KI at 25˚C by high-precision glass electrode potentiometric titrations. The pKw values obtained are in excellent agreement with, but generally more precise than, literature data. At I > 1 M the pKw values increase smoothly and show systematic differences in the order KCl < KBr < KI, consistent with the decreasing H+-acceptor ability of the medium anions. Analogous behaviour is observed in MCl solutions, with pKw values varying in the order NaCl < KCl < CsCl. Formation constants of MOH0 ion pairs derived from these data are consistent with literature values.

Studies of the Sodium Salts of Homologues of Alkyl Sulfates in Aqueous Solutions in Relation to the Water Structure

Bulletin of the Chemical Society of Japan ◽

10.1246/bcsj.45.3270 ◽

1972 ◽

Vol 45 (11) ◽

pp. 3270-3276 ◽

Cited By ~ 3

Author(s):

Harumi Endo

Keyword(s):

Aqueous Solutions ◽

Water Structure ◽

Sodium Salts ◽

Alkyl Sulfates

Static Water Structure Detected by Heat Capacity Measurements on Aqueous Solutions of a Triple-Helical Polysaccharide Schizophyllan

Biomacromolecules ◽

10.1021/bm0300251 ◽

2003 ◽

Vol 4 (5) ◽

pp. 1348-1356 ◽

Cited By ~ 8

Author(s):

Kazuto Yoshiba ◽

Akio Teramoto ◽

Naotake Nakamura ◽

Kyo Kikuchi ◽

Yuji Miyazaki ◽

...

Keyword(s):

Heat Capacity ◽

Aqueous Solutions ◽

Water Structure ◽

Static Water ◽

Heat Capacity Measurements

Water Structure, Quantum Nature of Hydrogen Bonds and Diffusion of Water Molecules in Chloride Aqueous Solutions

Water Science and Technology Library - Management of Water Quality in Moldova ◽

10.1007/978-3-319-02708-1_2 ◽

2014 ◽

pp. 21-34 ◽

Cited By ~ 1

Author(s):

I. I. Geru

Keyword(s):

Hydrogen Bonds ◽

Aqueous Solutions ◽

Water Structure ◽

Water Molecules ◽

Quantum Nature ◽

And Diffusion

Description of dilution enthalpies and heat capacities for aqueous solutions within the MSA–NRTL model with ion solvation

Fluid Phase Equilibria ◽

10.1016/j.fluid.2007.11.018 ◽

2008 ◽

Vol 264 (1-2) ◽

pp. 211-219 ◽

Cited By ~ 6

Author(s):

Jean-Pierre Simonin ◽

Olivier Bernard ◽

Nicolas Papaiconomou ◽

Werner Kunz

Keyword(s):

Aqueous Solutions ◽

Heat Capacities ◽

Ion Solvation ◽

Nrtl Model ◽

Dilution Enthalpies

Why Do Tetrapropylammonium Chloride and Sulphate Salts Destabilize the Native State of Globular Proteins?

The Scientific World JOURNAL ◽

10.1155/2014/870106 ◽

2014 ◽

Vol 2014 ◽

pp. 1-4

Author(s):

Giuseppe Graziano

Keyword(s):

Aqueous Solutions ◽

Water Structure ◽

Globular Proteins ◽

Volume Effect ◽

Statistical Thermodynamic ◽

Water Molecules ◽

Native State ◽

Excluded Volume Effect ◽

Low Charge ◽

Sulphate Salts

It has recently been shown that aqueous solutions of tetrapropylammonium chloride and sulphate salts destabilize the folded conformation of Trp-peptides (Dempsey et al., 2011). This result is rationalized by the application of a statistical thermodynamic approach (Graziano, 2010). It is shown that the magnitude of the solvent-excluded volume effect, the main contribution for the native state stability, decreases in both aqueous 2 M TPACl solution and aqueous 1 M TPA2SO4solution. This happens because TPA+ions are so large in size and interact so weakly with water molecules, due to their very low charge density, to be able to counteract the electrostrictive effect of chloride and sulphate ions on the water structure, so that the density of their aqueous solutions is smaller or only slightly larger than that of water.