A Visible Activated Complex Experiment

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When was the last time your class saw a catalyst in action? Chemistry scholars observe an activated complex during an engaging experiment. Through both color change and evolution of a gas, individuals gain insight into the oxidation/reduction of a cobalt compound and the resulting effect upon reaction rate.

3 Views 1 Download NGSS: Adaptable
Instructional Ideas

  • Perform the experiment as a demonstration for middle schoolers and have them record their observations from start to finish
  • Conduct the experiment as an inquiry for more advanced students where groups determine the most efficient cobalt catalyst for the reaction
Classroom Considerations

  • Provide supporting instruction on writing and balancing the chemical equation for pupils with less experience in this area

  • The demonstration gives learners an excellent opportunity to observe the effect of a catalyst on reaction rate
  • Resource is downloadable and printable
  • Reaction is easy to perform and clean up

  • None