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Question: Answered & Verified by Expert
In the following unbalanced reaction, the product formed is
$\mathrm{Al}_2 \mathrm{O}_3+\mathrm{NaOH}(a q)+\mathrm{H}_2 \mathrm{O} \longrightarrow$
ChemistryGeneral Principles and Processes of Isolation of MetalsAP EAMCETAP EAMCET 2022 (07 Jul Shift 1)
Options:
  • A $\mathrm{Na}_3\left[\mathrm{Al}(\mathrm{OH})_6\right]$
  • B $\mathrm{Na}_3\left[\mathrm{Al}(\mathrm{OH})_4\right]$
  • C $\mathrm{Na}_2\left[\mathrm{Al}(\mathrm{OH})_5\right]$
  • D $\mathrm{Na}\left[\mathrm{Al}(\mathrm{OH})_6\right]$
Solution:
2351 Upvotes Verified Answer
The correct answer is: $\mathrm{Na}_3\left[\mathrm{Al}(\mathrm{OH})_6\right]$
Aluminium oxide reacts with aqueous solution of sodium hydroxide to form sodium hexahydroxyaluminate (III).
$\mathrm{Al}_2 \mathrm{O}_3+\mathrm{NaOH}+\mathrm{H}_2 \mathrm{O} \longrightarrow \mathrm{Na}_3\left[\mathrm{Al}(\mathrm{OH})_6\right]$

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