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Applications of Colloids

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Estimated time: 3 minutes
Maharashtra State Board: Class 12

Key Points: Applications of Colloids

  • Purification of drinking water — alum (Al³⁺) coagulates negatively charged clay/mud particles
  • Medicines — most medicines are colloidal in nature (e.g., colloidal silver — argyrol, as antiseptic)
  • Rubber — obtained by coagulation of latex (a colloidal solution of rubber)
  • Cleansing action of soaps and detergents — works through micelle formation (colloidal action)
  • Photography — photographic plates and films are colloidal silver bromide in gelatin
  • Smoke precipitation — Cottrell precipitator uses electrophoresis to remove soot/dust particles from industrial smoke
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