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The P-Block Elements

Question
CBSEENCH11007264

What happens when:
Hydrated alumina is treated with aqueous NaOH solution?

Solution

Alumina dissolves in aqueous NaOH solution to form sodium meta-aluminate.
stack Al subscript 2 straight O subscript 3 2 straight H subscript 2 straight O left parenthesis straight s right parenthesis with Hydrated space alumina space left parenthesis Bauxite right parenthesis below plus 2 NaOH left parenthesis aq right parenthesis space rightwards arrow with Heat on top stack 2 NaAlO subscript 2 space plus space 3 straight H subscript 2 straight O with Sod. space meta space aluminate below
or
Al subscript 2 straight O subscript 3 2 straight H subscript 2 straight O space plus space 2 NaOH left parenthesis aq right parenthesis space plus space straight H subscript 2 straight O left parenthesis straight l right parenthesis space
space space space space space space space space space space space space space space space space space space space space space space rightwards arrow with Heat on top stack 2 Na left square bracket Al left parenthesis OH right parenthesis subscript 4 right square bracket space left parenthesis aq right parenthesis with Sod. tetrahydroxoaluminate left parenthesis III right parenthesis below