Which separation technique is used to separate different pigments in a mixture based on their affini

JAMB Chemistry 2023 66 views
Source: JAMB · 2023

Which separation technique is used to separate different pigments in a mixture based on their affinity for a stationary phase and a mobile phase?

  1. Filtration
  2. Distillation
  3. Chromatography ✓
  4. Decantation
Explanation

Chromatography separates pigments based on how they move. Different pigments stick to the paper differently. Some move fast, others move slowly.

Filtration removes solid particles. Distillation separates by boiling points. Decantation pours off liquids. None use affinity differences like chromatography.

Remember: Chromatography works like a race. Different substances travel at different speeds.

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