Artigo Produção Nacional Revisado por pares

Dissociation and solubility variation vspO2- of some alkaline-earth oxides in molten NaCl-KCl (at 1000 k)

1980; Elsevier BV; Volume: 25; Issue: 4 Linguagem: Inglês

10.1016/0013-4686(80)87025-3

ISSN

1873-3859

Autores

R. Combes, Felipe de Oliveira Andrade, Ana de Barros, Hadla S. Ferreira,

Tópico(s)

Bauxite Residue and Utilization

Resumo

Solubility products of various alkaline-earth oxides in NaCl-KCl at 1000 K have been determined potentiometrically by use of a calcia stabilized zirconia pO2- indicator electrode. The corresponding pKs values (in molality scale) for MgO, CaO and BaO, (respectively 9.0 ± 0.15, 5.0 ± 0.3, 2.31 ± 0.05) are compared, when possible, to those previously determined by other methods. The titration method suggested in this work seems to be more accurate and undoubtedly necessary when oxychloride formation is possible as shown with magnesium.

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