Instructional Video

Testing for the Negative Ions

Curated and Reviewed by Lesson Planet

Polyatomic ions... where do I begin? One of the most difficult concepts for budding scientists to learn and recognize comes to life in an enlightening resource. Show pupils some demonstrations, via the sixth video in a series of 10, to help them differentiate between carbonates, nitrates, and sulfates. Each test is thoroughly explained and easily reproduced live to further engage your class.

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Instructional Ideas
  • Paired learners can trade their written equations and grade one another's work
  • Show this resource prior to discussing the solubility rules
Classroom Considerations
  • The class should have prior knowledge of writing and balancing equations, anions in solution, and solubility
  • Pupils with hearing impairment can take notes from the video using subtitles
Pros
  • The tests illustrated are easy to perform and make great in-class demonstrations
  • The video encourages practice of writing and balancing equations, an essential skill for beginning chemists
Cons
  • None