1.

In the purification of bauxite by Hall's process

Answer»

The BAUXITE ONE is heated with concentrated NaOH solution at `150^(@)C`
The bauxite ore is heated with `NaHCO_(3)`
The bauxite ore is mixed with coke and heated at `1800^(@)C` in a current of `N_(2)`
The bauxite ore is fused with `Na_(2)CO_(3)`

Solution :The Hall.s process is
`Al_(2)O_(3)+Na_(2)CO_(3) to 2NaAlO_(3)+CO_(2)`
`2NaAlO_(2)+3H_(2)+CO_(2) to 2Al(OH)_(3)+Na_(2)CO_(3)`


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