Journal of Solution Chemistry

, Volume 1, Issue 1, pp 39–43 | Cite as

Transference numbers of potassium picrate in water at 25°C and the dimerization of picrate ions

  • P. G. N. Moseley
  • M. Spiro


The cation- and anion-constituent transference numbers of aqueous 0.02M potassium picrate have been measured at 25°C by the moving-boundary method. The large difference (0.014) between the results and the predictions of the Debye-Hückel-Onsager theory, and similar anomalies in the literature, are consistent with the existence of picrate ion dimers (Pi 2 2− ) with a formation constant of 4(±2) liter-mole−1.

Key Words

Transference number moving boundary potassium picrate dimerization aqueous 


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Copyright information

© Plenum Publishing Corporation 1972

Authors and Affiliations

  • P. G. N. Moseley
    • 1
  • M. Spiro
    • 2
  1. 1.Department of Chemistry, Faculty of ScienceUniversity of KhartoumKhartoumSudan
  2. 2.Department of ChemistryImperial College of Science and TechnologyLondonEngland

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