Question on: JAMB Chemistry - 2024
Which of these is the most preferred separation technique for the isolation of solutes where the purity of the constituent is of utmost importance?
A
sieving
B
Distillation
C
recrystallization
D
Precipitation
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Correct Option: C
Recrystallization is the preferred method for obtaining highly pure solutes. It involves dissolving the impure solid in a suitable solvent and allowing pure crystals to form slowly, leaving impurities in solution. Other methods:
- Distillation: Separates liquids by boiling points
- Sieving: Separates solids by particle size
- Precipitation: Forms solid from solution but may not guarantee high purity
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