Name

Period

Date

Conservation of Mass Lab

OBJECTIVE

• Will a chemical reaction cause mass to be created or destroyed?

MATERIALS

• baggie
• 10-mL graduated cylinder
• ½ TBS (½ tablespoon) NaHCO₃ (baking soda)
• 10 mL 3% acetic acid (vinegar)

DATA

1. before mass (m_o) = _____ g
2. after mass (m_f) = _____ g

PROCEDURE

1. Place the ½ TBS NaHCO₃ into the baggie.
2. Fill the graduated cylinder with vinegar.
3. Place the baggie on the balance pan.
4. Stand the vinegar in the baggie.
5. Mass out the 'before' mass.
6. Seal the baggie.
7. Spill the vinegar and mix.
8. When the reaction stops, mass out the 'after' mass.
9. CLEANUP
1. wash graduated cylinder with brush and soap
2. wash tray with soap and paper towel
3. dry grad. cyl. and tray

CALCULATIONS

1. ∆m = m_f - m_o

CONCLUSION