# Law of Conservation of Mass: Introduction to Weighing Using Analytical Balances

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Law of Conservation of Mass: Introduction to Weighing Using Analytical Balances
Law of Conservation of Mass / Introduction to Weighing Using the Analytical Balances

Brandon Palmisano
Lab Partners: Matt Hattenburg & Peyton Dannewitz
Chemistry A
Dr.Clark
Date: March 18, 2015

Introduction:
The Law of Conservation of Mass states the matter can neither be created nor destroyed. Antoine
Lavoisier is credited with the discovery of the Law of Conservation. Lavoisier carried out his ideas as early as 1774. The Law of Conservation has been proven by a variety of experiments.
For example, if you were to light a candle in completely closed room the mass of the room before lighting the candle would be exactly the same as the mass after lighting the candle. By combining vinegar and baking soda in a sealed water bottle we were able to further support the
Law of Conservation of Mass.

Objective:
The purpose of this experiment was to create a chemical reaction inside of a closed system in order to observe the Law of Conservation of Mass. A secondary objective of this lab was to use the analytical effectively and precisely.

Hypothesis:
If we mix baking soda and vinegar in a closed system then the mass of the reactants will equal that of the products because the Law of Conservation of Mass states that matter can neither be created nor destroyed.

Materials:
• Water Bottle
• Water Bottle Cap
• Vinegar
• Baking Soda

Materials (cont):
• Parafilm
• Scoopula
• Analytical Balance
• Weighing Paper
• 12 mL Plastic Test Tube

Procedure:
It was necessary for us to follow the directions carefully and precisely in order to obtain the desired results. We began by zeroing the analytical balance. Next, we made sure that we had all the required materials to perform the experiment. Then, one member of our group folded the weighing paper in half and placed it on the analytical balance. We then proceeded to zero the analytical balance with the lid closed and the weighing

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