Materials List: The Search for Surfactants: What Is the Best Soap?

For the teacher’s class demonstration 1:

  • 1 beaker of water
  • 2 paper clips
  • 1 small piece of toilet paper
  • liquid hand dish soap, a few drops, right from the bottle

For the teacher’s class demonstration 2:

  • 2 beakers
  • water
  • liquid food coloring
  • liquid hand dish soap, 5 ml per 100 ml of water
  • 2 small capillary tubes

Each group needs:

To share with the entire class:

  • 5 liquid hand dish soaps of various brands; estimated ~10 ml per group (of a variety of brands) plus ~25 ml for class demo (brand does not matter)
  • water
  • paper towels

A photograph shows four plastic squeeze-top capped clear plastic bottles containing three different brands of liquid hand dish soap sitting on a tray on a kitchen counter.
copyright
Copyright © 2016 Denise W. Carlson, ITL Program, College of Engineering, University of Colorado Boulder

https://www.teachengineering.org/activities/view/rice_surfactants_activity1