Mass Conservation Lab

Question:

During a chemical reaction (baking soda and vinegar), is mass conserved in both open and closed systems?

Background

Hypothesis:

(Predict how mass of the reactants and products will differ between the open and closed system.)

Materials:

Procedure:

(Write a complete step-by-step procedure to perform your experiment. Be sure to include all of the aspects of experimental design you have learned so far.)

Data:

(Record all data on a data table. Include that data table and any calculations and graphs in this section)

Open System

  1. ___________ g Plastic bag & NaHCO3
  2. ___________ g Plastic bag
  3. ___________ g NaHCO3
  4. ___________ g Beaker & CH3COOH
  5. ___________ g Beaker
  6. ___________ g CH3COOH
  7. ___________ g Total reactants
  8. ___________ g Plastic bag & products
  9. ___________ g Plastic bag
  10. ___________ g Total products

Closed System

  1. ___________ g Plastic bag & NaHCO3
  2. ___________ g Plastic bag
  3. ___________ g NaHCO3
  4. ___________ g Beaker & CH3COOH
  5. ___________ g Beaker
  6. ___________ g CH3COOH
  7. ___________ g Total reactants
  8. ___________ g Plastic bag & products
  9. ___________ g Plastic bag
  10. ___________ g Total products

Provide percentage change calculations for both the open and closed systems:

% change = 100(mass of products - mass of reactants)/ mass of reactants

Conclusion:

(Write your conclusion in this section. Be sure to follow all guidelines for writing conclusions to experiments and include data and an explanation of how the data supports your conclusion)