The iron (III) oxide impurity in bauxite can be removed by?

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Chemistry JAMB 1986

The iron (III) oxide impurity in bauxite can be removed by?

  • Fractional crystallization in acid solution
  • dissolution in sodium hydroxide and filtration checkmark
  • extraction with concentrated ammonia and reprecipitation
  • electroysis of molten mixture

The correct answer is: B

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