Anhydrous Magnesium chloride () cannot be prepared by simply heating its hydrated salt, , in an open vessel. What happens when is strongly heated?

Question

Anhydrous Magnesium chloride ($MgCl_2$) cannot be prepared by simply heating its hydrated salt, $MgCl_2 \cdot 6H_2O$, in an open vessel. What happens when $MgCl_2 \cdot 6H_2O$ is strongly heated?

Prashant Kotian · Accepted Answer

Correct answer: C. Due to the high polarizing power and high hydration energy of , the coordinated water molecules attack the chloride ions upon strong heating. This causes hydrolysis rather than simple dehydration: .

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