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प्रश्न
“Aluminium oxide is an amphoteric oxide.” Justify this statement giving chemical equation for the reactions involved.
रासायनिक समीकरणे/रचना
औचित्य
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उत्तर
Because it can react with both acids and bases, acting as a base with acid and an acid with base to generate salt and water, aluminum oxide is an amphoteric oxide.
\[\ce{\underset{Base}{Al2O3} + \underset{Acid}{6HCl} -> \underset{chloride}{\underset{Aluminium}{2AlCl3}} + 3H2O}\]
\[\ce{\underset{Base}{Al2O3} + \underset{Acid}{2NaOH} -> \underset{Aluminate}{\underset{Sodium}{2NaAlO2}} + H2O}\]
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