ICSE Class 10 Chemistry 2020 Solved Paper

Question : 50 of 86

Marks: +1, -0

Baeyer's process is used to concentrate bauxite ore to alumina.
Give balanced chemical equations for the reaction taking place for its conversion from bauxite to alumina.

Solution:

{ {\Al}_2 {\O}_3 ⋅ 2 {\H}_2 {\O}}↙{\Bauxite }+2 {\NaOH} → 2 {\NaAlO}_2

+3 {\H}_2 {\O}

{\NaAlO}_2+2 {\H}_2 {\O} → {\Al}( {\OH})_3+ {\NaOH}

2 {\Al}( {\OH})_3 \ {─────▸}↖ {1000^{∘} {\C}} {{\Al}_2 {\O}_3}↙{\Alumina}+3 {\H}_2 {\O}

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