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acidity function

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acidity function

[ə′sid·əd·ē ‚fəŋk·shən]
(chemistry)
A quantitative scale for measuring the acidity of a solvent system; usually established over a range of compositions.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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References in periodicals archive
Apparently, both SZ and SZA are solid superacids for the Hammett acidity function H0 a$?
Preparation of Metal Oxide-Doped Solid Superacid Catalyst and its Catalytic Performance
Effect of acidity function on the production of bio-methane in pure and mixed samples:
After a powdered physical treatment practice, samples were treated under different operating conditions of temperature (mesophilic and thermophilic), bacteria seeding cultures (methanococcus bornchii and methanobacterium formicum), acidity functions between (3-10) pH, respectively.
Design a mechanical- biological system for treatment biological wastes (orange peels, peel peas, okra shell) with optimization and qualification for liberal and residue products
The acidities of ILs were characterized and determined on the basis of the Hammett acidity function [18].
As shown in the followi ng equation, the Hammett acidity function is expressed as: H= PK (I)aq + log ([I]/[IH]+).
Catalytic Production of Hydroxymethylfurfural from Fructose Using BrAlnsted-Lewis Acidic Ionic Liquid
They proposed the acidity function [H.sub.o] defined by the equation
[4] These include disulfuric acid [H.sub.2.S.sub.2.O.sub.7], and flurosulfuric acid, [HSO.sub.3.F] [H.sub.2.S.sub.2.O.sub.7] + [H.sub.2.SO.sub.4] [right arrow] [H.sub.3.SO.sup.+.sub.4] + [HS.sub.2.O.sup.-.sub.7] [HSO.sub.3.F] + [H.sub.2.SO.sub.4] [right arrow] [H.sub.3.SO.sup.+.sub.4] + [SO.sub.3.F.sup.-] Gillespie and Peel [5] extended Hammett and Deyrup's acidity function measurements into these completely nonaqueous and still more highly acidic solutions.
The story of superacids
His publications dealt with topics in the fields of alkaloids, terpenes, steroids, amino-acids and peptides, carbohydrates, heterocyclic compounds, stereochemistry, conformational analysis, molecular volumes, ion mobilities, paper electrophoresis, dipole moments, electrostatic effects, acidity functions, acid-catalyzed reactions, solvent effects, and graph theory.
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