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Question
For the substance listed below, explain its role in the extraction of aluminium: Sodium hydroxide
One Line Answer
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Solution
Sodium hydroxide:
It reacts with alumina to form sodium aluminate which is
then further fiItered to separate impurities.
\[\ce{\underset{\text{Alumina}}{Al2O3.2H2O} + 2NaOH -> \underset{\text{Sodium aluminate}}{2NaAIO2} + 3H2O}\]
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