Activity #3: Investigating Carbon Dioxide Production

Materials:  straws, plastic cups, lids, bromothymol blue indicator, 

Part 1: Carefully view the below video. Using bromothymol blue, water, a plastic cup w/lid, straw, and baking soda, repeat the demonstration shown in the video below. 

Part 2: Carefully view the below video. Pay close attention to the suggested experiment at the end of the video. 

Part 3: Using the information in the above video above, design and conduct a proper experiment to answer the question below. Wear safety glasses. Document your experiment in your workbook.  


What effect does changing breathing have on carbon dioxide production?