In this lab experience, students are challenged to devise a method to increase the amount of carbon dioxide in seltzer water. Students will discover that increasing pressure and cooling the solution causes a shift where more carbon dioxide can dissolve in the solution. For best results, pressure and cooling, together, gives the most color change. In the higher levels, students will also relate this phenomena to real-world problems and manufacturing.
Safety:
Before conducting the lab, review the safety precautions on the student page with the class. Then discuss any safety precautions that are specific to your science laboratory or classroom.
Materials Included in Kit
Consumable:
Acetic acid, 1 M, 540 mL
Bromcresol green indicator solution, 0.04%, 75 mL
Seltzer water, 8 oz bottles, 3
Sodium bicarbonate, 100 g
Balloons, 12”, package of 20
Pipets, 20
Non-Consumable:
Syringes, 35 mL, 30
Syringe tip cap, 30
Bromcresol green indicator charts, 5
1-800-452-1261
