Oxoacidity reactions in equimolar molten CaCl2-NaCl mixture at 575 degrees C

被引：36

作者：

Castrillejo, Y ^{[1
]}

Martinez, AM ^{[1
]}

Haarberg, GM ^{[1
]}

Borresen, B ^{[1
]}

Osen, KS ^{[1
]}

Tunold, R ^{[1
]}

机构：

[1] NORWEGIAN UNIV SCI & TECHNOL,DEPT ELECTROCHEM,N-7034 TRONDHEIM,NORWAY

来源：

ELECTROCHIMICA ACTA | 1997年 / 42卷 / 10期

关键词：

molten chlorides; magnesium oxide; yttria stabilized zirconia electrode; chemometrics;

D O I：

10.1016/S0013-4686(96)00305-2

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 [应用化学];

摘要：

The behaviour of an yttria-stabilized zirconia electrode in the CaCl2-NaCl melt has been investigated at 575 degrees C. The response of the electrode is Nernstian and permits its use in the titration of Mg(II) with oxide ions. The solubility product of MgO was also determined. We have calculated the equilibrium constant of the carbonate ion dissociation as well as those corresponding to the systems HCl/H2O and Cl-2/O-2, finding that molten CaCl2-NaCl is more acidic than the LiCl-KCl eutectic melt and the BaCl2-CaCl2-NaCl (23.5:24.5:52 mol%) melt. On the other hand, the mixture can be purified with respect to oxide ions by gaseous reagents such as HCl and Cl-2. (C) 1997 Elsevier Science Ltd.

引用

页码：1489 / 1494

页数：6

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