Reflection: Rigor Alka Seltzer and Factors that Affect Reaction Rates - Section 5: Evaluate


While grading the lab I noticed how a lot of students got confused with the analysis section, particularly when they were supposed to both compare to the control and refer back to their predictions.  

  • Therefore, I decided to revise the lab for future years by separating these into two different sections.  I also made it more clear which test they were reflecting on by adding in what factor to analyze in the table.  
  • I also realized that having students analyze the reaction at the molecular level did not have to happen in the analysis, but rather could be done in the prelab when they were coming up with there predictions.  Therefore, I took out the molecular level drawing part from the analysis and placed it in as part of the prelab.  

  Rigor: Common Confusions with the Lab, so I Revised
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Alka Seltzer and Factors that Affect Reaction Rates

Unit 8: Unit 9: Reaction Rates and Equilibrium
Lesson 2 of 6

Objective: Students will be able to explain the factors that affect the rate of a reaction as evidenced by performing a lab activity.

Big Idea: Chemical reaction rates depend on various factors including stirring, temperature, surface area, and concentration.

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alka seltzer lab lesson
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