11 grade chemistry others
Is alumina basic or acidic?
Is alumina basic or acidic?
1 Answer
Askiitians Tutor Team
Alumina, which is also known as aluminum oxide (Al2O3), is considered amphoteric, meaning it can exhibit both acidic and basic properties depending on the circumstances.
In an acidic environment, alumina can act as a weak base by accepting protons (H+) from the medium. It can react with strong acids to form aluminum salts and water:
Al2O3 + 6HCl → 2AlCl3 + 3H2O
In a basic environment, alumina can behave as a weak acid by donating protons (H+) to the medium. It can react with strong bases to form aluminum hydroxide:
Al2O3 + 2NaOH → 2NaAlO2 + H2O
Therefore, alumina's amphoteric nature makes it capable of participating in reactions with both acids and bases.
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