Solubility of CoCl{sub 2} in molten NaCl-AlCl{sub 3}
Journal Article
·
· Journal of Physical Chemistry
- National Research Council of Canada, Ottawa (Canada)
- Argonne National Lab., IL (United States)
The solubility of CoCl{sub 2} in molten NaCl-AlCl{sub 3} was determined by aliquot sampling at 255{degree}C for acidic and basic solvent compositions. There was a pronounced compositional dependence of the solubility with a minimum at approximately the equimolar solvent composition. The solubility minimum was 1.04 x 10{sup -4} mol fraction of CoCl{sub 2}. The solubility in the highly ordered NaCl-AlCl{sub 3} solutions was described in chemical terms. The true solubility product for CoCl{sub 2} was calculated as 1.50 x 10{sup -15}. In basic and in somewhat acidic melts, the solubility was primarily related to the formation of the associated ionic species CoCl CoCl{sub 2}, CoCl{sub 3}{sup -}, and CoCl{sub 4}{sup 2}. The calculated formation constant of CoCl{sup +} was 9.48 x 10{sup 6}. Furthermore, the specific bond free energy for the associated complex, CoCl{sup +}, was -64.43 kJ mol{sup 1} for a coordination number of four. 18 refs., 3 figs., 3 tabs.
- OSTI ID:
- 70369
- Journal Information:
- Journal of Physical Chemistry, Journal Name: Journal of Physical Chemistry Journal Issue: 24 Vol. 99; ISSN JPCHAX; ISSN 0022-3654
- Country of Publication:
- United States
- Language:
- English
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