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Re-evaluation of stoichiometric dissociation constants from electrochemical cell data for formic acid at temperatures from (0 to 60)°C and for some other aliphatic carboxylic acids at (18 or 25) °C in aqueous potassium chloride solutions

Lookup NU author(s): Emeritus Professor Arthur Covington

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Abstract

Equations were determined for the calculation of stoichiometric dissociation constants of monoprotic aliphatic carboxylic acids in buffer solutions containing various carboxulic acids at 18 or 25 °C in aqueous potassium chloride solutions. The equations were applied for formic acid to temperatures from 0 to 60 °C and were based on the single-ion activity-coefficient equations of the Hückel type. The resulting equations for formic acid were tested with the data sets on galvanic cells. The Ḧ equations were also applied to a re-evaluation of the activity parameters of acetate species from the literature data obtained from Harned cells for aqueous mixtures of acetic acid and KCl.

Publication metadata

Author(s): Partanen JI, Covington AK

Publication type: Article

Publication status: Published

Journal: Journal of Chemical and Engineering Data

Year: 2005

Volume: 50

Issue: 2

Pages: 497-507

Print publication date: 01/03/2005

ISSN (print): 0021-9568

ISSN (electronic): 1520-5134

Publisher: American Chemical Society

URL: http://dx.doi.org/10.1021/je040013i

DOI: 10.1021/je040013i

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