Question

how is pure Alumina prepared from bauxite

Answer 1

HEY MATE HERE IS YOUR ANSWER



Instead, it is extracted by electrolysis. The ore is first converted into pure aluminium oxide by the Bayer Process, and this is then electrolysed in solution in molten cryolite - another aluminiumcompound. The aluminium oxide has too high a melting point to electrolyse on its own. The usual aluminium ore isbauxite.




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Answer 2

$\huge\rm\underline\purple{Question :-}$

How is pure Alumina prepared from bauxite.

$\large{\underbrace{\sf{\red{ Required\:Solution:}}}}$

Pure Alumina can be obtained from bauxite in the following steps:

$\boxed{ \sf \green{ First\: step: }}$

$Al_2O_{3(s)}+2NaOH{(aq)}+3H_2O{(l)}\underset{35-36 bar}{\xrightarrow{\text{473-523 K}}} 2Na[Al(OH)_4]{(aq)}$

$\boxed{ \sf \blue{ Second\: step: }}$

$2Na[Al(OH)_4]+CO_2{(s)}\underset{35-36 bar}{\xrightarrow{\text{473-523 K}}} Al_2O_3.xH_2O+2NaHCO_3$

$\boxed{ \sf \pink{ Third\: step: }}$

$Al_2O_3.xH_2O \overset{1407K}{\longrightarrow}</p><p></p><p>Al_2O_3+xH_2O$

✯Note:

$\orange{\underline\bold{Here,}}$

✏ $Al_2O_{3(s)}$is $\red{\underline\bold{Bauxite.}}$

✏ $2Na[Al(OH)_4]{(aq)}$ is $\red{\underline\bold{Sodium \:aluminate.}}$

✏ $Al_2O_3$ is $\red{\underline\bold{Pure \:alumina.}}$

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