Solute-solute-solvent interactions in dilute aqueous solutions of aliphatic diols. Excess enthalpies and gibbs free energies

1989 ◽  
Vol 18 (3) ◽  
pp. 289-300 ◽  
Author(s):  
Gianna Borghesani ◽  
Rodolfo Pedriali ◽  
Fernando Pulidori
Keyword(s):  
Aqueous Solutions ◽  
Excess Enthalpies ◽  
Free Energies ◽  
Solvent Interactions ◽  
Dilute Aqueous Solutions

Metal Ion Complexes of p-Toluenesulfonyl Amino Acids: I: p-Toluenesulfonyl Glycine

1968 ◽  
Vol 23 (5) ◽  
pp. 606-608
Author(s):  
Joseph M. Reyes ◽  
Herschel Frye
Keyword(s):  
Amino Acids ◽  
Transition Metal ◽  
Aqueous Solutions ◽  
Metal Ion ◽  
Dissociation Constants ◽  
Metal Cations ◽  
Similar Data ◽  
Free Energies ◽  
Coordination Numbers ◽  
Dilute Aqueous Solutions

The methods of polarographic analysis have been applied to the study of dilute aqueous solutions of various divalent transition metal cations coordinated to p-toluenesulfonyl glycine. Metal cations used were cadmium (II), copper (II), lead (II), mercury (II), manganese (II) and zinc (II). Six new and previously unreported compounds were prepared and studied polarographically, and their dissociation constants and coordination numbers are herein reported. Free energies of formations are also given for several of the complexes. In general, these data agree with similar data in the literature for the complexes of glycine itself.

Excess enthalpies of dilute aqueous solutions of model peptides and urea at 25°C

1992 ◽  
Vol 21 (10) ◽  
pp. 1093-1106 ◽  
Author(s):  
G. Barone ◽  
P. Del Vecchio ◽  
C. Giancola
Keyword(s):  
Aqueous Solutions ◽  
Excess Enthalpies ◽  
Dilute Aqueous Solutions ◽  
Model Peptides

The reactions of oligoalcohols with arsenic, arsenous, boric and germanic acids

1980 ◽  
Vol 45 (10) ◽  
pp. 2645-2655 ◽  
Author(s):  
Antonín Mikan ◽  
Miloš Bartušek
Keyword(s):  
Aqueous Solutions ◽  
Equilibrium Constants ◽  
Dilute Aqueous Solutions

The reactions of sorbitol, mannitol, adonitol, dulcitol, glucose and glycerol with H3AsO4, H3AsO3, H3BO3 and GeO2 acids in dilute aqueous solutions were studied by potentiometric neutralization titrations. The formation of the following chelates was demonstrated: As(V)L3-, As(III)L(OH)2-, HAs(III)L(OH)2, BL2-, GeL2(OH)- and GeL32- and the equilibrium constants for their formation were found. Conditions for formation of these chelates of organic oligohydroxy compounds are discussed.

Study of potential oscillations during reaction of an aluminium single crystal with an aqueous KOH solution

1990 ◽  
Vol 55 (2) ◽  
pp. 345-353 ◽  
Author(s):  
Ivan Halaša ◽  
Milica Miadoková
Keyword(s):  
Aqueous Solutions ◽  
Single Crystal ◽  
Single Crystals ◽  
Periodic Potential ◽  
Optimum Conditions ◽  
Potential Oscillations ◽  
Dilute Aqueous Solutions ◽  
Experimental Findings ◽  
Kinetics Of

The authors investigated periodic potential changes measured on oriented sections of Al single crystals during spontaneous dissolution in dilute aqueous solutions of KOH, with the aim to find optimum conditions for the formation of potential oscillations. It was found that this phenomenon is related with the kinetics of the reaction investigated, whose rate also changed periodically. The mechanism of the oscillations is discussed in view of the experimental findings.

A tensammetric study of polyacrylamides, including their determination

1988 ◽  
Vol 66 (10) ◽  
pp. 2658-2663 ◽  
Author(s):  
Truis Smith-Palmer ◽  
Byron R. Wentzell ◽  
John C. Donini ◽  
Robert J. Jerrard
Keyword(s):  
Aqueous Solutions ◽  
Limits Of Detection ◽  
Dilute Aqueous Solutions ◽  
Phase Sensitive

Phase-sensitive tensammetry is shown to be a convenient and useful way to analyse polyacrylamides and associated derivatives (pams) in dilute aqueous solutions. Standard curves were obtained with ranges varying from 9 to 25 ppm and limits of detection varying from 0.7 to 2 ppm. Ways to change the range and sensitivity are discussed and demonstrated. Typical interferences and their effects are tabulated, and the analysis of pams in coal washings is discussed. The analysis of certain mixtures of polyacrylamides is shown to be possible.

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