scholarly journals Examining the Hofmeister Series through Activation Energies: Water Diffusion in Aqueous Alkali-Halide Solutions

2020 ◽  
Author(s):  
Ashley K. Borkowski ◽  
Zeke A. Piskulich ◽  
Ward H. Thompson
Keyword(s):  
Alkali Halide ◽  
Activation Energies ◽  
Water Diffusion ◽  
Aqueous Alkali ◽  
Hofmeister Series

Hydrogen Isotope Fractionation in Aqueous Alkali Halide Solutions

1997 ◽  
Vol 52 (11) ◽  
pp. 811-820 ◽  
Author(s):  
Masahisa Kakiuchi
Keyword(s):  
Oxygen Isotope ◽  
Isotope Effect ◽  
Alkali Halide ◽  
Hydrogen Isotope ◽  
Isotope Fractionation ◽  
Free Water ◽  
Aqueous Alkali ◽  
Water Molecules ◽  
Oxygen Isotope Fractionation ◽  
Hydrogen Isotope Effect

Abstract The D/H ratios of hydrogen gas in equilibrium with aqueous alkali halide solutions were deter-mined at 25 °C, using a hydrophobic platinum catalyst. The hydrogen isotope effect between the solution and pure water changes linearly with the molality of the solution at low concentrations, but deviates from this linearity at higher concentration for all alkali halide solutions. The magnitude of the hydrogen isotope effect is in the order; Kl > Nal > KBr > CsCl ≧ NaBr > KCl > NaCl > LiCl, at concentrations up to a molality of 4 m. The sign and trend of the hydrogen isotope effect is different from that of oxygen. In aqueous alkali halide solutions, the hydrogen isotope effect is influenced by both the cation and the anion species, while the oxygen isotope effect is mainly caused by the cation species. This suggests that the mechanism of hydrogen isotope fractionation between the water molecules in the hydration spheres and the free water molecules differs from the mechanism of the oxygen isotope fractionation. The hydrogen and oxygen isotope effects for alkali halides, except LiCl and NaCl, may be influenced by changes in energy of the hydrogen bonding in free water molecules.

scholarly journals Ion Pairing in Molecular Simulations of Aqueous Alkali Halide Solutions

2009 ◽  
Vol 113 (19) ◽  
pp. 6782-6791 ◽  
Author(s):  
Christopher J. Fennell ◽  
Alan Bizjak ◽  
Vojko Vlachy ◽  
Ken A. Dill
Keyword(s):  
Alkali Halide ◽  
Molecular Simulations ◽  
Ion Pairing ◽  
Aqueous Alkali

scholarly journals High-Pressure Viscosity of Aqueous Alkali Halide Solutions at 298.2K.

1996 ◽  
Vol 45 (3) ◽  
pp. 280-285 ◽  
Author(s):  
Takehiro NAKAI ◽  
Seiji SAWAMURA ◽  
Yoshihiro TANIGUCHI
Keyword(s):  
High Pressure ◽  
Alkali Halide ◽  
Aqueous Alkali
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