Testing for Chlorides, Bromides, and Iodides

How do we know when water is safe to drink? Part seven of a 10-part videos series uses water quality as a platform to explore the behavior of halide ions in solution, Further tests help learners differentiate between precipitates that can look similar. 

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Instructional Ideas
  • Compare the results of the tests shown in the resource to similar tests using soluble halogen compounds, such as potassium iodide or sodium chloride
  • Show the video prior to a water quality lab or lesson
Classroom Considerations
  • The class should have prior knowledge of writing net ionic equations, the periodic table, and solubility
  • The video links the subject matter to a real-world topic for bigger impact
  • Individuals benefit from seeing simple tests explained in clear terms
  • None