AMPHOTERIC BEHAVIOR OF COMPLEX SYSTEMS : IV. NOTE ON THE ISOELECTRIC POINT AND IONIZATION CONSTANTS OF SULFANILIC ACID.

From the solubility minimum the value of the basic ionization constant of sulfanilic acid is shown to lie probably between the values 1.7 x 10(–15) and 3.2 x 10(–15). From solubility measurements the value of this same constant is shown to lie probably between 2.0 and 2.2 x 10(–15), and the isoelect...

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Detalles Bibliográficos
Autor principal: Stearn, Allen E.
Formato: Texto
Lenguaje:English
Publicado: The Rockefeller University Press 1927
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2140914/
https://www.ncbi.nlm.nih.gov/pubmed/19872329
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author Stearn, Allen E.
author_facet Stearn, Allen E.
author_sort Stearn, Allen E.
collection PubMed
description From the solubility minimum the value of the basic ionization constant of sulfanilic acid is shown to lie probably between the values 1.7 x 10(–15) and 3.2 x 10(–15). From solubility measurements the value of this same constant is shown to lie probably between 2.0 and 2.2 x 10(–15), and the isoelectric point of sulfanilic acid is thus at a cH of 0.056 or a pH of 1.25. From conductivity ratios the acid ionization constant of sulfanilic acid is shown to be 7.05 x 10(–4) at room temperature (21°C.). Calculations are made, from data published in preceding papers, of the ionization constants of glycine, K(a) being 2.3 x 10(–10), and K(b) being 2.2 x 10(–12).
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spelling pubmed-21409142008-04-23 AMPHOTERIC BEHAVIOR OF COMPLEX SYSTEMS : IV. NOTE ON THE ISOELECTRIC POINT AND IONIZATION CONSTANTS OF SULFANILIC ACID. Stearn, Allen E. J Gen Physiol Article From the solubility minimum the value of the basic ionization constant of sulfanilic acid is shown to lie probably between the values 1.7 x 10(–15) and 3.2 x 10(–15). From solubility measurements the value of this same constant is shown to lie probably between 2.0 and 2.2 x 10(–15), and the isoelectric point of sulfanilic acid is thus at a cH of 0.056 or a pH of 1.25. From conductivity ratios the acid ionization constant of sulfanilic acid is shown to be 7.05 x 10(–4) at room temperature (21°C.). Calculations are made, from data published in preceding papers, of the ionization constants of glycine, K(a) being 2.3 x 10(–10), and K(b) being 2.2 x 10(–12). The Rockefeller University Press 1927-01-20 /pmc/articles/PMC2140914/ /pubmed/19872329 Text en Copyright © Copyright, 1927, by The Rockefeller Institute for Medical Research This article is distributed under the terms of an Attribution–Noncommercial–Share Alike–No Mirror Sites license for the first six months after the publication date (see http://www.rupress.org/terms). After six months it is available under a Creative Commons License (Attribution–Noncommercial–Share Alike 4.0 Unported license, as described at http://creativecommons.org/licenses/by-nc-sa/4.0/).
spellingShingle Article
Stearn, Allen E.
AMPHOTERIC BEHAVIOR OF COMPLEX SYSTEMS : IV. NOTE ON THE ISOELECTRIC POINT AND IONIZATION CONSTANTS OF SULFANILIC ACID.
title AMPHOTERIC BEHAVIOR OF COMPLEX SYSTEMS : IV. NOTE ON THE ISOELECTRIC POINT AND IONIZATION CONSTANTS OF SULFANILIC ACID.
title_full AMPHOTERIC BEHAVIOR OF COMPLEX SYSTEMS : IV. NOTE ON THE ISOELECTRIC POINT AND IONIZATION CONSTANTS OF SULFANILIC ACID.
title_fullStr AMPHOTERIC BEHAVIOR OF COMPLEX SYSTEMS : IV. NOTE ON THE ISOELECTRIC POINT AND IONIZATION CONSTANTS OF SULFANILIC ACID.
title_full_unstemmed AMPHOTERIC BEHAVIOR OF COMPLEX SYSTEMS : IV. NOTE ON THE ISOELECTRIC POINT AND IONIZATION CONSTANTS OF SULFANILIC ACID.
title_short AMPHOTERIC BEHAVIOR OF COMPLEX SYSTEMS : IV. NOTE ON THE ISOELECTRIC POINT AND IONIZATION CONSTANTS OF SULFANILIC ACID.
title_sort amphoteric behavior of complex systems : iv. note on the isoelectric point and ionization constants of sulfanilic acid.
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2140914/
https://www.ncbi.nlm.nih.gov/pubmed/19872329
work_keys_str_mv AT stearnallene amphotericbehaviorofcomplexsystemsivnoteontheisoelectricpointandionizationconstantsofsulfanilicacid

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