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← ScienceWhich consequence results when dissolving magnesium oxide (MgO) in water?
A)Heat generation occurs, hydrolysis mechanism.✓
B)pH declines from carbonic acid formation.
C)Oxygen gas produced, redox active.
D)Ozone liberated due to high charge.
💡 Explanation
Heat is released because the hydration of the Mg²⁺ and O²⁻ ions during dissolution via the hydrolysis mechanism is highly exothermic, therefore the temperature increases rather than an endothermic or redox reaction.
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