Complex equilibrium calculations magnesium ions

On the basis of emf data, obtained for the system MgCl2-KCl at 800°C, the equilibrium constant of reaction (109) was calculated to be 1.8 10 3. Such a low value of the dissociation constant is an indication of the high stability of the MgCl42 ion. The conclusion which results from these thermodynamic studies is that there are complex species present in melts of alkali chlorides containing magnesium chloride. 

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