Materials List: Oil and Water:
Washing Up with Surfactants

Each group needs:

  • cooking oil, 2 tablespoons (approximately 30 mL)
  • finely ground coffee beans, 2 tablespoons (approximately 30 mL)
  • sink with running water
  • hand soap
  • 4 paper towels
  • stopwatch
  • smocks

To share with the entire class:

  • (optional) microscopes, to closely examine skin
  • (optional) computer with Internet access, to show students a YouTube video