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.

Concepts

catalysts, chemical reactions, making observations, rate of reaction, colors, hydrogen peroxide, carbon dioxide, redox reactions

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Additional Tags

science

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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

Pros

• 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
  

Cons

• None