explain bauxite being amphoteric in nature dissolve in conc. sodium hydroxide
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(b) Bauxite ore contains approximately 60% aluminium oxide. The rest being sand, ferric oxide and ... Aluminium oxide dissolves in sodium hydroxide and forms sodium meta aluminate.
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The Bayer process is the principal industrial means of refining bauxite to produce alumina (aluminium oxide) and was developed by Carl Josef Bayer. Bauxite, the most important ore of aluminium, contains only 30–60% aluminium oxide (Al2O3), the rest being a mixture of silica, various iron oxides, and titanium dioxide.[1] The aluminium oxide must be purified before it can be refined to aluminium metal.
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