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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
Pros
- The video links the subject matter to a real-world topic for bigger impact
- Individuals benefit from seeing simple tests explained in clear terms
Cons
- None