The Hydrated Proton [H(H2O)n]+ as the Basis of Unified Complex Acidity Function Scale $$H_{{\text{o}}}^{{\text{w}}}$$ in Aqueous Solutions of Strong Acids With a Predominant Water Concentration

Values of the Hammett acidity function H0 can be correlated for strong acid solutions up to −H0 values of 3.5 via a Bascombe and Bell type equation:[Formula: see text] taking into account the degree of dissociation of the acids. This can be interpreted according to[Formula: see text]and[Formula: see text]Alternatively, an approach based on the treatment of equilibrium constants in terms of mole-fractions yields[Formula: see text]valid for the same acids (H2SO4, HClO4, HCl, and HNO3) and again involving a tri-dehydration of the tetra-hydrated proton. The log of the ratio [Formula: see text] has been found to be proportional to −H0 itself and to be otherwise independent of the nature of the acid anion.

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Improved Indicator Algorithms for Tracking a Hydrated Proton as A Local Structural Defect in Grotthuss Diffusion in Aqueous Solutions

Chemical Physics Letters ◽

10.1016/j.cplett.2021.139121 ◽

2021 ◽

pp. 139121

Author(s):

Sahitya Talachutla ◽

Shamik Bhat ◽

Adam W. Duster ◽

Hai Lin

Keyword(s):

Aqueous Solutions ◽

Structural Defect ◽

Hydrated Proton

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Dissociation of strong acids in aqueous solutions

Journal of the Chemical Society Dalton Transactions ◽

10.1039/dt9820002425 ◽

1982 ◽

pp. 2425 ◽

Cited By ~ 14

Author(s):

Djordje M. Petkovi?

Keyword(s):

Aqueous Solutions ◽

Strong Acids

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SYNTHESIS OF N-SUBSTITUTED DIISOPROPANOLAMINES, THEIR SEBACATE POLYESTERS AND POLYURETHANE ELASTOMERS

Canadian Journal of Chemistry ◽

10.1139/v58-206 ◽

1958 ◽

Vol 36 (10) ◽

pp. 1405-1409 ◽

Cited By ~ 5

Author(s):

Jean L. Boivin

Keyword(s):

Aqueous Solutions ◽

Infrared Absorption ◽

Propylene Oxide ◽

Sebacic Acid ◽

Ionization Constants ◽

Polyurethane Elastomers ◽

Molecular Weights ◽

Slight Excess ◽

Infrared Absorption Spectra ◽

Strong Acids

Several N-substituted diisopropanolamines were prepared by reacting aqueous solutions of amines with excess propylene oxide at ordinary pressure but higher N-substituted diisopropanolamines had to be prepared in an autoclave at 200 °C. The ionization constants of these bases were measured and recorded as pKa values. Their infrared absorption spectra gave bands common to all diisopropanolamines mainly at 3.04, 7.14, 7.55, 7.85, 9.45, 10.6, and 11.95 microns. Their condensation with sebacic acid gave the corresponding polyesters, which were soluble in strong acids and had molecular weights of about 1500. The hydroxyl-terminated polyesters were cured with a slight excess of 2,4-tolylene diisocyanate at 100 °C for 2 days to yield elastomers of brittle temperatures in the region of −50 °C.

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