Short answerEasy3 marks
Baeyer's process is used to concentrate bauxite ore to alumina. Give balanced chemical equations for the reaction taking place for its conversion from bauxite to alumina.
Topic: Metallurgy, ores, extraction and alloys
Previous-year question practice database
Answer
Exam answer
Al₂O₃·2H₂O + 2NaOH → 2NaAlO₂ + 3H₂O; then 2NaAlO₂ + 4H₂O → 2Al(OH)₃↓ + 2NaOH; finally 2Al(OH)₃ → Al₂O₃ + 3H₂O.