Activity to demonstrate the law of conservation of mass
Answers
Materials Per Group:
2 small plastic cups
vinegar (acetic acid)
baking soda (sodium bicarbonate)
triple beam balance
flask
Alka-seltzer tablets
SAFETY NOTE:
Safety goggles and aprons must be worn.
Students must seal the bag completely in thenexperiment so that the chemicals do not
spray out.
Engagement:
Drop an Alka-seltzer tablet into a beaker of water.
Explore:
1. Fill one cup halfway with vinegar.
2. Fill a second cup halfway with baking soda.
3. Put both cups in the plastic bag. Take care NOT to spill the contents of either cup.
4. Determine the mass of the cups and their contents, and the plastic bag. Write the values in
your data table.
5. Seal the plastic bag.
6. Without opening the bag, pour the vinegar into the cup of baking soda.
7. Without opening the bag, record the mass of the contents of the plastic bag. Take care not
to break the seal of the plastic bag.
The Law of conservation of mass is hence verified.
HOPE YOU UNDERSTOOD THE ANSWER.