Influence of Structure Breaking and Structure Forming Ions on the Dissociation Mechanism of Acetic Acid in Aqueous Solutions

1988 ◽  
Vol 43 (2) ◽  
pp. 123-128 ◽  
Author(s):  
J. A. Escriñá ◽  
M. L. Bañón ◽  
J. González-Velasco
Keyword(s):  
Acetic Acid ◽  
Aqueous Electrolyte ◽  
Electrolyte Solutions ◽  
Weak Acid ◽  
Dissociation Rate ◽  
Rotating Disc ◽  
Dissociation Mechanism ◽  
Enthalpy And Entropy ◽  
Activated Complex ◽  
Structure Breaking

Using a rotating disc electrode, the dissociation rate of acetic acid in various aqueous electrolyte solutions is studied. Li+ , Cs+ and (CH3)4N+ at 1 M concentration considerably modify the activation enthalpy and entropy of the reaction. Evidently the interaction between the cations and water influences the dissociation mechanism of the weak acid. In the presence of 1 molar Li+ the activated complex of acetic acid seems to contain only one water molecule instead of two in the other cases.

An Investigation of the Structure of Aqueous Electrolyte Solutions by Statistical Geometry

1993 ◽  
Vol 48 (7) ◽  
pp. 806-810 ◽  
Author(s):  
M. Kiselev ◽  
M. Poxleitner ◽  
J. Seitz-Beywl ◽  
K. Heinzinger
Keyword(s):  
Aqueous Electrolyte ◽  
Quantitative Description ◽  
Electrolyte Solutions ◽  
Water Molecules ◽  
Statistical Geometry ◽  
Monovalent Ions ◽  
Definition Of ◽  
Dynamics Simulations ◽  
New Criterion ◽  
Structure Breaking

Abstract Statistical geometry is employed for a quantitative description of deviations from regular octahedrality of water around monovalent ions and from regular tetrahedrality of solvent water around water molecules. For these deviations a new criterion is presented by taking into account octahedral and tetrahedral spatial symmetry groups. A geometrical definition of structure making and structure breaking is proposed and illustrated on the basis of molecular dynamics simulations of 2.2 molal aqueous KCl and LiI solutions with the flexible BJH model of water.

Promoting Nitrogen Electroreduction to Ammonia with Bismuth Nanocrystals and Potassium Cations in Water

2020 ◽  
Author(s):  
Jaecheol Choi ◽  
Hoang-Long Du ◽  
Manjunath Chatti ◽  
Bryan H. R. Suryanto ◽  
Alexandr Simonov ◽  
...  
Keyword(s):  
Electrocatalytic Activity ◽  
Aqueous Electrolyte ◽  
Electrolyte Solutions ◽  
Reduction Reaction ◽  
Nitrogen Reduction ◽  
Aqueous Electrolyte Solutions

We demonstrate that bismuth exhibits no measurable electrocatalytic activity for the nitrogen reduction reaction to ammonia in aqueous electrolyte solutions, contrary to several recent reports on the highly impressive rates of Bi-catalysed electrosynthesis of NH<sub>3</sub> from N<sub>2</sub>.

scholarly journals Macroscopic conductivity of aqueous electrolyte solutions scales with ultrafast microscopic ion motions

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Vasileios Balos ◽  
Sho Imoto ◽  
Roland R. Netz ◽  
Mischa Bonn ◽  
Douwe Jan Bonthuis ◽  
...  
Keyword(s):  
Aqueous Electrolyte ◽  
Electrolyte Solutions ◽  
Aqueous Electrolyte Solutions

NMR Studies of Aqueous Electrolyte Solutions. IV. Hydration Numbers of Strong Electrolytes Determined from Temperature Effects on Proton Shifts

1971 ◽  
Vol 54 (1) ◽  
pp. 178-181 ◽  
Author(s):  
Brother Ferdinand J. Vogrin ◽  
Paul S. Knapp ◽  
William L. Flint ◽  
Arthur Anton ◽  
Gerald Highberger ◽  
...  
Keyword(s):  
Temperature Effects ◽  
Aqueous Electrolyte ◽  
Electrolyte Solutions ◽  
Hydration Numbers ◽  
Nmr Studies ◽  
Aqueous Electrolyte Solutions ◽  
Strong Electrolytes
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