Reagent used in Bayer's process of concentrat | vedclass

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(A) Bauxite $(Al_2O_3 \cdot 2H_2O)$ is an important ore of aluminium containing impurities like $Fe_2O_3$,$SiO_2$,and $TiO_2$.In the Bayer's process,t

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$NaOH$

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(A) Bauxite $(Al_2O_3 \cdot 2H_2O)$ is an important ore of aluminium containing impurities like $Fe_2O_3$,$SiO_2$,and $TiO_2$.In the Bayer's process,the crushed ore is treated with a concentrated solution of sodium hydroxide $(NaOH)$ at high temperature and pressure.This dissolves the aluminium oxide present in the bauxite to form soluble sodium aluminate $(NaAlO_2)$,while the impurities remain insoluble.The chemical reaction is: $Al_2O_3 \cdot 2H_2O + 2NaOH \rightarrow 2NaAlO_2 + 3H_2O$.Thus,$NaOH$ is the reagent used in the Bayer's process.

Reagent used in Bayer's process of concentration of bauxite ore is:

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