Chemistry · Group 13 to Group 18 Elements
Identify the principle behind the concentration of bauxite ore:
Identify the principle behind the concentration of bauxite ore:
- A. magnetic property of impurities in white bauxite
- B. low specific gravity of \( A l_{2} O_{3} \)
- C. amphoteric nature of \( A l_{2} O_{3} \)
- D. high melting point of \( A l_{2} O_{3} \)
Step-by-step solution
Bauxite concentration (Bayer's process) relies on Al2O3 being amphoteric: it dissolves in NaOH to form soluble sodium aluminate, while impurities like Fe2O3 remain insoluble, allowing separation.
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