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Journal
2012 | 10 | 2 | 332-337
Article title

The solubility of Ca(OH)2 in extremely concentrated NaOH solutions at 25°C

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EN
Abstracts
EN
The solubility of Ca(OH)2 in aqueous NaOH solutions up to 12.50 M at 25°C has been determined. The solubility data obtained for NaOH concentrations lower than 3 M was compared with those published in the literature. The solubility of Ca(OH)2 steadily decreases with the increasing NaOH concentration. The solubility data obtained at a constant ionic strength (I = 1 M Na(Cl,OH)) enabled the determination of the conditional solubility product of Ca(OH)2(s) (lgLCa(OH)2 = − 4.10 ± 0.02). Formation of the hydroxo complex CaOH+(aq) was invoked to describe the variation of [Ca2+]T with [OH−]T. Its conditional stability constant was found to be lgKCaOH+ = 0.97 ± 0.02. The experimental protocol employed was proven to be suitable for accurate solubility determinations in rapidly equilibrating systems comprising of highly concentrated, alkaline solutions and containing analytes in the ppm range. [...]
Publisher

Journal
Year
Volume
10
Issue
2
Pages
332-337
Physical description
Dates
published
1 - 4 - 2012
online
29 - 1 - 2012
Contributors
  • Department of Inorganic and Analytical Chemistry, University of Szeged, Szeged, H-6701, P.O. Box 440, Hungary
author
  • Department of Inorganic and Analytical Chemistry, University of Szeged, Szeged, H-6701, P.O. Box 440, Hungary
author
  • Department of Inorganic and Analytical Chemistry, University of Szeged, Szeged, H-6701, P.O. Box 440, Hungary
  • Inspectorate for Environment, Nature Conservation and Water in the Region of Lower Tisza, H-6721, Szeged, Hungary
  • Department of Organic Chemistry, University of Szeged, H-6720, Szeged, Hungary
  • Department of Physical Chemistry and Materials Science, University of Szeged, Szeged, H-6720, Hungary
author
  • Department of Inorganic and Analytical Chemistry, University of Szeged, Szeged, H-6701, P.O. Box 440, Hungary, sipos@chem.u-szeged.hu
References
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Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.-psjd-doi-10_2478_s11532-011-0145-0
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