Spectrophotometric Determination of the Thermodynamic pK Value of Picric Acid in Water at 25 °C

The thermodynamic pK value of picric acid was determined spectrophotometrically in water containing hydrochloric acid to repress the ionization. The pK value 0.33 (K ≈ 0.46) was obtained from data at 450 mμ. Attempts to determine the pK value by potentiometric titrations of picric acid and by spectr...

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Autores principales: Davis, Marion Maclean, Paabo, Maya
Formato: Online Artículo Texto
Lenguaje:English
Publicado: [Gaithersburg, MD] : U.S. Dept. of Commerce, National Institute of Standards and Technology 1963
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5319453/
https://www.ncbi.nlm.nih.gov/pubmed/31580583
http://dx.doi.org/10.6028/jres.067A.024
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author Davis, Marion Maclean
Paabo, Maya
author_facet Davis, Marion Maclean
Paabo, Maya
author_sort Davis, Marion Maclean
collection PubMed
description The thermodynamic pK value of picric acid was determined spectrophotometrically in water containing hydrochloric acid to repress the ionization. The pK value 0.33 (K ≈ 0.46) was obtained from data at 450 mμ. Attempts to determine the pK value by potentiometric titrations of picric acid and by spectrophotometric measurements of picric acid solutions in the near-saturation range did not yield satisfactory results. The new pK value is compared with previously published values.
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spelling pubmed-53194532019-10-01 Spectrophotometric Determination of the Thermodynamic pK Value of Picric Acid in Water at 25 °C Davis, Marion Maclean Paabo, Maya J Res Natl Bur Stand A Phys Chem Article The thermodynamic pK value of picric acid was determined spectrophotometrically in water containing hydrochloric acid to repress the ionization. The pK value 0.33 (K ≈ 0.46) was obtained from data at 450 mμ. Attempts to determine the pK value by potentiometric titrations of picric acid and by spectrophotometric measurements of picric acid solutions in the near-saturation range did not yield satisfactory results. The new pK value is compared with previously published values. [Gaithersburg, MD] : U.S. Dept. of Commerce, National Institute of Standards and Technology 1963 1963-06-01 /pmc/articles/PMC5319453/ /pubmed/31580583 http://dx.doi.org/10.6028/jres.067A.024 Text en https://creativecommons.org/publicdomain/zero/1.0/ The Journal of Research of the National Bureau of Standards Section A is a publication of the U.S. Government. The papers are in the public domain and are not subject to copyright in the United States. Articles from J Res may contain photographs or illustrations copyrighted by other commercial organizations or individuals that may not be used without obtaining prior approval from the holder of the copyright.
spellingShingle Article
Davis, Marion Maclean
Paabo, Maya
Spectrophotometric Determination of the Thermodynamic pK Value of Picric Acid in Water at 25 °C
title Spectrophotometric Determination of the Thermodynamic pK Value of Picric Acid in Water at 25 °C
title_full Spectrophotometric Determination of the Thermodynamic pK Value of Picric Acid in Water at 25 °C
title_fullStr Spectrophotometric Determination of the Thermodynamic pK Value of Picric Acid in Water at 25 °C
title_full_unstemmed Spectrophotometric Determination of the Thermodynamic pK Value of Picric Acid in Water at 25 °C
title_short Spectrophotometric Determination of the Thermodynamic pK Value of Picric Acid in Water at 25 °C
title_sort spectrophotometric determination of the thermodynamic pk value of picric acid in water at 25 °c
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5319453/
https://www.ncbi.nlm.nih.gov/pubmed/31580583
http://dx.doi.org/10.6028/jres.067A.024
work_keys_str_mv AT davismarionmaclean spectrophotometricdeterminationofthethermodynamicpkvalueofpicricacidinwaterat25c
AT paabomaya spectrophotometricdeterminationofthethermodynamicpkvalueofpicricacidinwaterat25c

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