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  • In this activity, students create a single layer of detergent molecules on water and use measurements and calculations to determine the length of the molecules.

    By the end of this activity, students should be able to:

    • briefly explain the difference between hydrophilic and hydrophobic parts of a detergent molecule
    • explain how to get a single layer of detergent molecules on a water surface
    • use simple measurements and mathematical equations to calculate the length of a detergent molecule.

    Download the Word file for:

    • introduction/background notes
    • what you need
    • what to do
    • student handout.
      Published 28 May 2008, Updated 11 April 2014 Referencing Hub articles
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