Chemistry, asked by hemantamangang79257, 6 months ago

Why is NaOH solution used in concentration of Bauxite ore by chemical means?

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Answered by riya1660
2

Answer:

In leaching, a suitable reagent (not water) dissolves the ore and not the impurities. Thus, leaching is a chemical method of separation/ concentratlon of the ore from impurities.

Leaching is used in extraction of Al from bauxite.

Sodium Aluminate is filtered. The filtrate is neutralised by passing CO²

The sodium silicate remains in the solution and hydrated alumina is filtered, dried and heated to about 1200°C to get pure Alumina.

This process is called Bayer's process.

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