ULTRAVIOLET STUDY OF THE IONIZATION OF BISULFATE ION

1965 ◽  
Vol 43 (10) ◽  
pp. 2867-2871 ◽  
Author(s):  
J. T. Edward ◽  
I. C. Wang
Keyword(s):  
Sulfuric Acid ◽  
Aqueous Solutions ◽  
Dissociation Constant ◽  
Optical Density ◽  
Univalent Cations ◽  
Sulfate Ion ◽  
Sodium Potassium ◽  
Second Stage ◽  
Dilute Aqueous Solutions ◽  
Raman Spectral

Studies of the ultraviolet absorption of dilute aqueous solutions of lithium, sodium, potassium, and ammonium sulfates show that the concentration of sulfate ion in the presence of univalent cations can be determined from the optical density of the solution at 190 mμ. The concentrations of sulfate ion thus determined in dilute solutions of sulfuric acid are in agreement with values reported previously from Raman spectral, conductivity, and other studies, which indicate a dissociation constant K2 = 0.01 for the second stage in the ionization of sulfuric acid.

STUDIES ON DICYANOTRIAZOLE: I. THE CONDUCTANCE OF DILUTE AQUEOUS SOLUTIONS OF DICYANOTRIAZOLE AT 25 °C.

1942 ◽  
Vol 20b (8) ◽  
pp. 161-167 ◽  
Author(s):  
E. G. Taylor
Keyword(s):  
Aqueous Solution ◽  
Aqueous Solutions ◽  
Dissociation Constant ◽  
Experimental Studies ◽  
Equivalent Conductance ◽  
A Value ◽  
Dilute Aqueous Solution ◽  
Dilute Aqueous Solutions

Previous experimental studies of dicyanotriazole have resulted in statements that the compound is an acid comparable in strength with the strong mineral acids.In the present work, measurements of the equivalent conductance of dicyanotriazole in dilute aqueous solution give the dissociation constant of the acid as 3.378 × 10−2 at 25 °C., thus showing it to be an acid possessing about the same strength as dichloracetic acid.The limiting equivalent conductance of dicyanotriazole at 25 °C. is 384.9. The earlier work gave a value of 397.44.

Extraction of silver and mercury with tetraphenyl imidothiodiphosphate

1987 ◽  
Vol 52 (7) ◽  
pp. 1708-1714 ◽  
Author(s):  
Oldřich Navrátil ◽  
Eckhard Herrmann ◽  
Petr Slezák
Keyword(s):  
Aqueous Solutions ◽  
Dissociation Constant ◽  
Aqueous Phase ◽  
Extraction Mechanism ◽  
Dilute Aqueous Solutions ◽  
Double Extraction

The extraction of complexes of silver and mercury with tetraphenyl imidothiodiphosphate (HA) from HNO3 and HCl solutions, respectively, into benzene was studied. The extraction from dilute aqueous solutions establishes within 10 min. The composition and stability of the complexes extracted, AgA(HA) and HgA2, were derived from the dependences of the distribution ratios of the respective metals on the acidity of the aqueous phase and analytical concentration of reagent. Using HClO4 solutions as the aqueous phase, silver is extracted by a double extraction mechanism, an appreciable fraction of the metal passing into benzene also in the absence of HA. Based on the distribution of HA between the aqueous phase and benzene, its distribution and dimerization constants were established; the dissociation constant of the reagent was determined potentiometrically.

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.

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