Question

Bauxite is leached with :

• A. KCl
• B. NaCN
• C. NaOH
• D. Na2SO4

Answer 1

Answer: (C)

NaOH

Answer 2

Al2O3 (bauxite) + 2NaOH (aq) + H2O (l) $\overset{\quad leaching\quad}{\rightarrow}$ 2Na[Al(OH)4] (aq).