In the purification of bauxite by Hall's proc | vedclass

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(B) In Hall's process,the bauxite ore is fused with sodium carbonate $(Na_2CO_3)$ to form soluble sodium aluminate $(NaAlO_2)$.$Al_2O_3 \cdot 2H_2O +

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Bauxite ore is fused with $Na_2CO_3$

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(B) In Hall's process,the bauxite ore is fused with sodium carbonate $(Na_2CO_3)$ to form soluble sodium aluminate $(NaAlO_2)$.$Al_2O_3 \cdot 2H_2O + Na_2CO_3 	o 2NaAlO_2 + CO_2 + 2H_2O$The resulting solution is filtered and treated with $CO_2$ to precipitate aluminum hydroxide:$2NaAlO_2 + 3H_2O + CO_2 \xrightarrow{333 \ K} 2Al(OH)_3 \downarrow + Na_2CO_3$Finally,the aluminum hydroxide is calcined to obtain pure alumina:$2Al(OH)_3 \xrightarrow{1473 \ K} Al_2O_3 + 3H_2O$

In the purification of bauxite by Hall's process:

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