Author(s)

Tadeusz Michałowski, Agustin G. Asuero

Department of Analytical Chemistry, The University of Seville, Seville, Spain.
Faculty of Engineering and Chemical Technology, Technical University of Cracow, Kraków, Poland.

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+C²·10^PK1 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.

Isohydric Solutions; pH Titration

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.