In this lab experience, students are challenged to determine and recommend the most energy efficient metal used in cookware. Students determine that despite evidence to the contrary (i.e., the disappearance of solid matter in a chemical reaction), mass is conserved because the matter is changed from one form to another, not destroyed.
Safety:
Before conducting the lab, review with the class the safety precautions on the student page. Then discuss any safety precautions that are specific to your science laboratory or classroom. Good ventilation is required since combustion reactions can generate a large amount of smoke. Caution students that they should wait for their test tubes to cool for approximately 10 minutes prior to weighing them and that hot glass looks just like cold glass.
Materials Included in Kit
Consumable:
Acetic acid, HC2H3O2, 2 M, 750 mL
Sodium bicarbonate, NaHCO3, 250 g
Balloons, 5”, package of 50, 2
Weighing dishes, 20
Additional Materials Required Cylinder, Borosilicate Glass, 50 mL, 10
Flask, Erlenmeyer, Borosilicate Glass, 125 mL, 10
Flinn Scientific Electronic Balance, 210 x 0.01-g, 10
Powder Funnel, Polypropylene, 80 mm, 10
Support Stand, 6" x 9", 10
Spatulas, Disposable, Box of 300, 1
1-800-452-1261
