An analysis of electrical conductances of aqueous solutions of polybasic organic acids. Benzenehexacarboxylic (mellitic) acid and its neutral and acidic salts

Alexander Apelblat, Marija Bešter-Rogač, Josef Barthel, Roland Neueder

Research output: Contribution to journalArticlepeer-review

19 Scopus citations

Abstract

A general approach is proposed to analyze electrical conductivities in aqueous solutions of polybasic organic acids. Experimental conductivities are examined in the context of dissociation and hydrolysis reactions by applying the Quint-Viallard conductivity equations and the Debye-Hückel equations for activity coefficients. The proposed numerical procedure is illustrated by the case of benzenehexacarboxylic (mellitic) acid and its neutral and acidic salts. From conductivity measurements of mellitic acid and its salts, performed in dilute aqueous solutions in the 278.15-308.15 K temperature range, the limiting conductances of mellitic anions, λ0(1/jH6-jMel -j, T), j = 1, 2, 3, 4, 5, 6 are determined.

Original languageEnglish
Pages (from-to)8893-8906
Number of pages14
JournalJournal of Physical Chemistry B
Volume110
Issue number17
DOIs
StatePublished - 4 May 2006

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Materials Chemistry

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