Formulation of the System of Isohydric Solutions

DOI: 10.4236/jasmi.2012.21001   PDF   HTML     3,390 Downloads   6,744 Views   Citations

Abstract

The isohydricity (pH constancy) as the property referred to mixtures of acids or bases, is illustrated on a simple example of the solutions: HL (C0, mol/L) and HL (C mol/L) mixed according to titrimetric mode (pH titration). A new derivation of the Michalowski formula C0=C+C2·10PK1 expressing this property is presented, and its applicability for determination of pK1 = – logK1 value is indicated. The principle of the isohydric method of pK1 determination is also outlined.

Share and Cite:

T. Michałowski and A. G. Asuero, "Formulation of the System of Isohydric Solutions," Journal of Analytical Sciences, Methods and Instrumentation, Vol. 2 No. 1, 2012, pp. 1-4. doi: 10.4236/jasmi.2012.21001.

Conflicts of Interest

The authors declare no conflicts of interest.

References

[1] S. Arrhenius, “Theorie der Isohydrischen Losungen,” Zeitschrift für Physikalische Chemie, Vol. 2, 1888, p. 284.
[2] J. Inczédy, “Analytical Applications of Complex Equilibria,” Horwood, Chichester, 1976.
[3] T. Micha?owski, M. Rymanowski and A. J. Pietrzyk, “Nontypical Br?nsted Acids and Bases,” Journal of Chemical Education, Vol. 82, No. 3, 2005, p. 470. doi:10.1021/ed082p470
[4] T. Micha?owski, B. Pilarski, A. G. Asuero and A. Dobkowska, “A New Sensitive Method of Dissociation Constants Determination Based on the Isohydric Solutions Principle,” Talanta, Vol. 82, No. 5, 2010, pp. 1965-1973. doi:10.1016/j.talanta.2010.08.024
[5] T. Micha?owski, B. Pilarski, A. G. Asuero, A. Dobkowska and S. Wybraniec, “Determination of Dissociation Parameters of Weak Acids in Different Media According to the Isohydric Method,” Talanta, Vol. 86, 2011, pp. 447-451. doi:10.1016/j.talanta.2011.09.002
[6] R. de Levie, “On Isohydric Solutions and Buffer pH,” Journal of Electroanalytical Chemistry, Vol. 582, No. 1-2, 2005, pp. 21-27. doi:10.1016/j.jelechem.2004.12.028
[7] A. G. Asuero, “Buffer Capacity of a Polyprotic Acid: First Derivative of the Buffer Capacity and pKa Values of Single and Overlapping Equilibria,” Critical Reviews in Analytical Chemistry, Vol. 37, No. 4, 2007, pp. 269-301. doi:10.1080/10408340701266238
[8] A. G. Asuero and T. Micha?owski, “Comprehensive Formulation of Titration Curves for Complex Acid-Base Systems and Its Analytical Implications,” Critical Reviews in Analytical Chemistry, Vol. 41, No. 2, 2011, pp. 151-187. doi:10.1080/10408347.2011.559440
[9] T. Micha?owski, M. Toporek and M. Rymanowski, “Overview on the Gran and Other Linearisation Methods Applied in Titrimetric Analyses,” Talanta, Vol. 65, No. 5, 2005, pp. 1241-1253. doi:10.1016/j.talanta.2004.08.053
[10] T. Micha?owski, M. Toporek and M. Rymanowski, “pH-Static Titration: A Quasistatic Approach,” Journal of Chemical Education, Vol. 84, No. 1, 2007, p. 142. doi:10.1021/ed084p142
[11] T. D. DuBose Jr. and L. Lee Hamm, “Acid-Base and Electrolyte Disorders. A Companion to Brenner & Rector’s, The Kidney,” WB Saunders, Philadelphia, 2002.

  
comments powered by Disqus

Copyright © 2020 by authors and Scientific Research Publishing Inc.

Creative Commons License

This work and the related PDF file are licensed under a Creative Commons Attribution 4.0 International License.