Conservation of Mass

Conservation of Mass Lab

Initial Mass (g)

Final Mass (g)

Change in Mass (g)

Part 1 155.82 152.90 - 2.92

Part 2 62.82 56.06 - 6.76

Analysis and Interpretation

1. Organizing conclusions.

Describe all evidence indications that a chemical change occurred in this experiment

1. When the vinegar was added to the baking soda, the reaction let out a smell and it started bubbling and gas came out. The reaction also rose, and changed its color

2. Evaluating Conclusions.

Was the law of conservation of mass really violated in Part 1 as it appeared? Explain your answer.

Yes, the law of conservation of mass was violated in Part 1 because the experiment was not conducted like Part 2 which was sealed. The experiment was held in the open which allowed the mass to decrease when the baking soda and the vinegar started to react.

3. Evaluating Methods

Explain why the results for Part 2 were different from those for Part 1. What is the system used in Part 1? What is the system in Part 2? How do they differ?

In part 1, the procedure was held openly, meaning that when the gas from the baking soda was given off, it lost mass, but when in Part 2 the experiment was in a plastic bag, it made a difference with the