Journal of Solution Chemistry

, Volume 9, Issue 2, pp 109–128

Ionization of aqueous toluic acids: Conductance and thermodynamics

  • Laurence E. Strong
  • Thomas G. Copeland
  • Margaret Darragh
  • Carter Van Waes
Article

DOI: 10.1007/BF00644483

Cite this article as:
Strong, L.E., Copeland, T.G., Darragh, M. et al. J Solution Chem (1980) 9: 109. doi:10.1007/BF00644483

Abstract

Conductivities of aqueous solutions ofortho-, meta-, andpara-toluic acids have been measured for the concentration range 0.1–2 millimolar and at 5° intervals from 5 to 100°C. At each temperature pKa(m) andA0 have been calculated using the paired ion model recently described by Fuoss. Thermodynamic parameters have been calculated for the ionization of each acid, and Walden products for the anions. Results are discussed in terms of contributions to acidity by enthalpy and entropy changes as well as by hydration of the various solute species.

Key words

Acid ortho-toluic meta-toluic para-toluic equilibrium constant ionization heat capacity enthalpy entropy conductivity aqueous solution Walden product 

Copyright information

© Plenum Publishing Corporation 1980

Authors and Affiliations

  • Laurence E. Strong
    • 1
  • Thomas G. Copeland
    • 1
  • Margaret Darragh
    • 1
  • Carter Van Waes
    • 1
  1. 1.Chemistry DepartmentEarlham CollegeRichmond

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