Law of conservation of mass

Topics: Chemistry, Mass, Hydrogen Pages: 3 (773 words) Published: November 27, 2013
Law of Conservation of Mass Lab
Introduction-
Problem: To validate the law of conservation of mass and to examine what happens when one Alka- Seltzer tablet is combined with water. Hypothesis: If the Alka-Seltzer tablet is combined with water, then Co2 will be produced because when mixing the two compounds, a chemical reaction will occur. Materials:

-Alka-Seltzer tablet
-Balance (Grams)
-Balloon
-Flask (125 mL)
-Water
-File
-Forceps
-Massing tray

Procedure:
1.Mass the Alka-Seltzer tablet then put the flask on the scale to record the mass, and zero the scale. 2.Add 50 mL of water to the flask and record the mass. Subtract the mass of the flask from the mass of the water in the flask to find the total mass of the water. Next mass the balloon. Add together the mass of the water and tablet 3.Break the Alka-Seltzer tablet over the massing tray, then using the forceps pick up both pieces of tablet. When dropping the tablet into the flask have your partner place the balloon over the opening of the flask at the same time. 4.Wait until fizzing/ bubbling subsides (aprox. 20 minutes) then mass the flask with balloon on top. From this subtract the mass of the flask and balloon from the total mass of the flask, water, tablet and balloon combined. By doing this, the number that is left should be approximately the same mass as when the experiment began.

Data Tables and Analysis:
Mass of Reactants Table
MaterialMass (g)
Flask93.20
Tablet3.22
Balloon2.98
50mL of water47.59

3.22g (Tablet)
+ 47.59g (50mL of water)
50.81g (Mass of reactant)

Mass of Products Table
MaterialMass (g)
Flask with Balloon and chemical reaction146.62

146.62g (Flask with balloon and chemical reaction)
- 2.98g (Balloon)
93.20g (Flask)
50.44g (Mass of Product)

Conclusion:
The purpose of this experiment was to validate the law of conservation of mass and to examine what will happen as a result...
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