In this activity, students test a variety of commercially available table salts for the presence of iodine – a micronutrient essential for health and wellbeing.

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

  • recognise the difference in structural terms between the element iodine and one of its ionic forms known as iodide ion
  • describe a simple chemical test to detect the presence of iodine in iodised salt and explain in simple terms the chemistry underlying the test
  • effectively manipulate simple laboratory equipment
  • successfully test commercially available table salts for the presence of iodine
  • demonstrate an understanding of the role iodine plays in the body.

Download the Word file (see link below) for:

  • introduction/background notes
  • what you need
  • what to do
  • student worksheet.
    Published 18 March 2011