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Explain the Baeyer’s process of conversion of Bauxite into alumina. |
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Answer» (i) Bauxite ore is finely ground and heated under pressure with a solution of concentrated caustic soda solution at 150°C to obtain sodium meta aluminate. (ii) On diluting sodium meta aluminate with water, a precipitate of aluminium hydroxide is formed. (iii) The precipitate is filtered, washed, dried and ignited at 1000°C to get alumina. 2Al(OH)3 + 1000°C ⟶ Al2O3 + 3H2O |
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