Pitzer model parameters for sparingly soluble salts from solubility measurements: The systems TlCl + SrCl{sub 2} + H{sub 2}O and TlCl + BaCl{sub 2} + H{sub 2}O at 25{degrees}C
- and others
The solubility of thallium(I) chloride has been determined in aqueous solutions of strontium chloride and barium chloride at concentrations up to 1.5 mol kg{sup -1}. The data were analyzed using Pitzer`s equations without making explicit assumption of association to ion pairs by assuming {alpha} = 3 instead of {alpha} = 2, with the {Beta}{sup 1} term for TlCl being equivalent to the {Beta}{sup 2} term for 2-2 electrolytes. {open_quotes}Best values{close_quotes} of {Beta}{sup 0} and {Beta}{sup 1} for TlCl are recommended together with K{sub s}, the activity solubility product. These were used to fit the present solubility data and derive the Pitzer model mixture parameters relevant to the systems, {theta}{sub TIN} and {Psi}{sub TINCl} (N = Sr, Ba). Mixture parameters for TlCl + MCl + H{sub 2}O systems are also derived to complete the parameter base. The fit of the experimental data was found to be worse when higher-order terms for asymmetrical mixing were included in the analysis. Activity coefficients for thallium(I) chloride in the mixtures are derived.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 244004
- Journal Information:
- Journal of Solution Chemistry, Vol. 24, Issue 10; Other Information: PBD: Oct 1995
- Country of Publication:
- United States
- Language:
- English
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