Before, During and After Class Learning Cycle Activities CCLI 2009 Catalysis Example

Oklahoma State University

This is a sample Before Class Exploration on catalysis in chemical reactions. To answer the questions on this BCE it is OK to use your textbook, but if you can answers the questions without it that is OK too.

Do not press the RETURN or ENTER key while you are answering these questions. Your browser will interpret either the same as clicking on the Submit key.

Answer all of the questions below. If you do not know an answer enter CNA. However, it will help me the most if you answer each question with your best intuition/idea about what would be a reasonable answer.

The BCE should be completed before class starts, for this BCE class has already met. It will not count towards your BCE total. NOTE: If class has not started and you receive this message, go ahead and do the BCE, I'll still count it.

First Name:

Last Name:

Laboratory Section:

In this BCE on catalysis you will use one of the simulations below based on the last digit in your Campus Wide ID:

Last Digit CWID


0 - 4

Reaction A molecular

5 - 9

Reaction B molecular

When you click on the link for the particular Experiment # a new page will be displayed and the reaction system will be loaded. Click on the Resume Button and then click on the Enable Reactions button. Answer Questions 1 and 2.

1) Indicate whether you are doing Reaction A or Reaction B.

2) Write the balanced chemical equation for the reaction that occurs in the simulation.

If you need to, click the Reset button, the Resume button and the Enable Reactions button to view the reaction again.

3) Write the mechanism for the reaction.

Click the Reset button and the Resume button. In the next question you will need to time how long it takes for the reaction to produce six product molecules. Perform three trails.

4) Click on the Enable Reactions button and time how long it takes to produce six product molecules.

  Trail 1 Trial 2 Trial 3 Average

Time to produce six product molecules





5. Is there anything about the questions that you feel you do not understand? List your concerns/questions.

6. If there is one question you would like to have answered in lecture, what would that question be?