Respuesta :
TiO₂ is basic in nature (NaOH itself is a base).
SiO2 (Acidic) and Al₂O3 (amphoteric) in nature can completely react with NaOH.
Bayer process: The Bayer process is used for refining bauxite to produce alumina (aluminum oxide). Bauxite is an important ore of aluminum.
Separation of and Fe2O3 and TiO2 from Al2O3 in the TiO2,
Bayer process as given below:
SiO2 (s) + 2NaOH(aq) + 2H2O(l)→ Na2Si(OH)6 (aq)
Al₂O3(s) + NaOH(aq) +3H₂O(l) → 2NaAl(OH)4 (aq)
Fe2O3(s)+ NaOH(aq) → No reaction
TiO2 (s) + NaOH(aq) → No reaction
From the above reaction,
we can conclude that Fe₂O3 and TiO2 can not react with NaOH.
So TiO₂ is basic in nature (NaOH itself is a base).
SiO2 (Acidic) and Al₂O3 (amphoteric) in nature can completely react with NaOH.
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