ISSN:
1572-8927
Keywords:
Calcium
;
molybdate
;
aqueous
;
thermodynamic
;
complexation
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Abstract The solubility of powellite [CaMoO4(c)] was studied in aqueous Na2MoO4, CaCl2 and Ca(NO3)2 solutions ranging in concentrations from 1×10−4M to 1.0M and over equilibration times extending to 36 days. Our experimental data were interpreted using the aqueous ion-interaction model of Pitzer and coworkers. The Ca2+−MoO 4 2− ion-interactions were found to be analogous to Ca2+−SO 4 2− . The use of Ca2+−MoO 4 2− ion-interactions parameters (β(0)=0.2, β(1) = 3.1973 and β(2)) and a logK sp of −7.93 gave excellent predictions of all of the experimental data. Commonion ternary interaction parameters such as MoO 4 2− −Cl− or MoO 4 2− −NO 3 − were not required.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00649561
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