Evaluation of Transition Points between Different Solid Phases in Aqueous Media

DOI: 10.4236/jasmi.2014.43012   PDF   HTML     2,686 Downloads   3,158 Views   Citations


A uniform procedure is suggested for calculation of the pHt value(s) separating equilibrium solid phases in pH scale, at an excess of the precipitating agent. The pHt value, related to pairs of precipitates formed from the species   and  , fulfils the relation , where F is a constant value involving pKso’s for solubility products (Kso’s) of these precipitates, and the equilibrium data, related to the species composing these precipitates.

Share and Cite:

Michałowska-Kaczmarczyk, A. and Michałowski, T. (2014) Evaluation of Transition Points between Different Solid Phases in Aqueous Media. Journal of Analytical Sciences, Methods and Instrumentation, 4, 87-94. doi: 10.4236/jasmi.2014.43012.

Conflicts of Interest

The authors declare no conflicts of interest.


[1] Michalowski, T. and Pietrzyk, A. (2006) A Thermodynamic Study of Struvite + Water system. Talanta, 68, 594-601.
[2] Michalowski, T. and Asuero, A.G. (2012) Thermodynamic Modeling of Dolomite Behavior in Aqueous Media. Journal of Thermodynamics, 2012, Article ID 723052.
[3] Michalowski, T. (2011) Application of GATES and MATLAB for Resolution of Equilibrium, Metastable and Non-Equilibrium Electrolytic Systems. In: Michalowski, T., Ed., Applications of MATLAB in Science and Engineering, Chapter 1, InTech, Rijeka, 1-34.
[4] Michalowski, T. and Lesiak, A. (1994) Formulation of Generalized Equations for Redox Titration Curves. Chemia Anali-Tyczna (Warsaw), 39, 623-637.
[5] Michalowski, T., Ponikvar-Svet, M., Asuero, A.G. and Kupiec, K. (2012) Thermodynamic and Kinetic Effects Involved with pH Titration of As(III) with Iodine in a Buffered Malonate System. Journal of Solution Chemistry, 41, 436-446. http://dx.doi.org/10.1007/s10953-012-9815-6
[6] Michalowski, T., Asuero, A.G., Ponikvar-Svet, M., Toporek, M., Pietrzyk, A. and Rymanowski, M. (2012) Principles of Computer Programming Applied to Simulated pH-Static Titration of Cyanide According to a Modified Liebig-Denigès Method. Journal of Solution Chemistry, 41, 1224-1239.
[7] Michalowski, T., Toporek, M., Michalowska-Kaczmarczyk, A.M. and Asuero, A.G. (2013) New Trends in Studies on Electrolytic Redox Systems. Electrochimica Acta, 109, 519-531.
[8] Michalowski, T., Michalowska-Kaczmarczyk, A.M. and Toporek, M. (2013) Formulation of General Criterion Distinguishing between Non-Redox and Redox Systems. Electrochimica Acta, 112, 199-211.
[9] Michalowski, T. (1982) Solubility Diagrams and Their Use in Gravimetric Analysis. Chemia Analityczna, 27, 39.
[10] Dirkse, T.P., Michalowski, T., Akaiwa, H. and Izumi, F. (1986) Copper, Silver, Gold and Zinc, Cadmium, Mercury Oxides and Hydroxides. Pergamon Press, Oxford.
[11] Michalowski, T., Janecki, D., Lechowicz, W. and Meus, M. (1996) pH Intervals for Precipitates in Two-Phase Systems. Chemia Analityczna (Warsaw), 41, 687-695.
[12] Crannell, B.S., Eighmy, T.T., Krzanowski, J.E., Eusden Jr., J.D. Shaw, E.L. and Francis, C.A. (2000) Heavy Metal Stabilization in Municipal Solid Waste Combustion Bottom Ash Using Soluble Phosphate. Waste Management, 20, 135-148. http://dx.doi.org/10.1016/S0956-053X(99)00312-8
[13] Viellard, P. and Tardy, Y. (1984) Thermochemical Properties of Phosphates. In: Nriagu, J.O. and Moore P.B., Eds., Phosphate Minerals, Springer-Verlag, Berlin, 171-198. http://dx.doi.org/10.1007/978-3-642-61736-2_4
[14] Inczédy, J. (1976) Analytical Applications of Complex Equilibia. Horwood, Chichester.
[15] Saisa-ard, O. and Haller, K.J. (2012) Crystallization of Lead Phosphate in Gel Systems. Engineering Journal, 16, 161-168. http://dx.doi.org/10.4186/ej.2012.16.3.161

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.