Chemistry, asked by vipingogo744, 1 year ago

What is the Chemical reagent used in leaching of bauxite

Answers

Answered by Sweetykaur
5
Sodium Hydroxide is mainly used for leaching of bauxite in Aluminum production.
Answered by kobenhavn
2

Answer: NaOH

Explanation: Leaching is the process of treating powdered ore with a suitable reagent which can selectively dissolves the ore and leave the impurities .

Alumina is obtained from bauxite by leaching with NaOH.

Al_2O_3(s)+2NaOH(aq)+3H_2O(l)\rightarrow 2Na[Al(OH)_4](aq)

SiO_2(s)+2NaOH(aq)\rightarrow Na_2SiO_3(aq)+H_2O(l)

2Na[Al(OH)_4](aq)+2CO_2(g)\rightarrow Al_2O_3.xH_2O(s)+2NaHCO_3(aq)

Al_2O_3.xH_2O(s)\rightarrow Al_2O_3(s)+xH_2O9g)

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