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← ScienceWhich outcome occurs when anhydrous magnesium chloride decomposes?
A)Formation of magnesium oxide and HCl✓
B)Sublimation into gaseous magnesium dichloride
C)Solvation by ambient water molecules
D)Irreversible covalent bond rearrangement occurs
💡 Explanation
Heating magnesium chloride drives pyrolysis because thermal energy overcomes lattice energy, leading to ionic bond breakage and subsequent formation of magnesium oxide and HCl gas; therefore, these new molecules form rather than others, because chlorine attracts stray hydrogen rather than covalently bonding with magnesium.
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