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Which consequence results when deionized water contacts magnesium chloride?

A)Significant exothermic heat release
B)Spontaneous magnesium metal precipitation
C)Formation of a covalent complex
D)Passivation via oxide layer growth

💡 Explanation

Dissolving magnesium chloride releases considerable heat, because **hydration enthalpy** overcomes the **lattice energy**, therefore significant heat evolves rather than precipitation or complex formation; these require additional energy or specific redox conditions.

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