* Problem/Purpose * Background Information: The Law of Conservation of Mass was made by Antoine Lavoisier inside the 18th century. This legislation stated that mass may matter could neither be created nor destroyed. Within a reaction the bonds from the reactants will be broken and form new substances. Mentioned previously in the Legislation of Conservation, matter can neither be created nor destroyed; for that reason the products needs to have the same type and number of atoms as seen in the reactants. * Goal: Test legislation of Conservation of Mass.

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5. Hypothesis: Whenever we weight the mass of the materials before and after the reaction, after that we can confirm if the Rules of Preservation of Mass is true.

* Materials:

* Safety glasses

2. 25mL graduated cylinder

* a couple of resealable hand bags

* Scale

* Antacid tablet

* Scoopula

* CaCl2, Calcium mineral Chloride

* NaHCO3, Sodium Hydrogen Carbonate

* Widespread Indicator

5. Procedure

Part A

1 . Measure 25mL of water and set into a resealable bag. Trim air out from the bag and seal it. Record the mass in Table 1 .

2 . Record the mass of the antacid tablet in Table one particular 3. Hint the bag sideways, even though holding the bag in this way, add the tablet and water thus not blend. Do not pitfall any extra air in the bag. Reseal the carrier. 4. Area tablet drop into the drinking water. Observe the effect until it comes to a complete quit. Record the observations. 5. When the response is total, record the mass of the bag as well as contents in Table 1 ) Part W

6. Add two scoops of CaCl2 to the second bag six. Add 1 scoop of NaHCO3 to the bag and shake gently to mix. almost 8. Determine the mass from the bag as well as contents. Record in Desk 2 . 9. Measure 25mL of water in a managed to graduate cylinder. Add 10 drops of Widespread Indicator for the water. 12. Tip the bag sideways, and while keeping the hues in the higher part of the handbag, pour the into the tote so the shades don’t combine. 11. To get trapped atmosphere to a minimum, reseal the bag. Hold the carrier and let the water move from end from the bag to the other before the contents happen to be mixed. 12. Observe the response until it involves a complete stop. Record your observations 13. Record the mass from the unopened bag in Table 2 . Clean up your work and wash your hands before departing the laboratory.

* Data/Results

Desk 1: Antacid and Water|

Mass of handbag and water| 27. 085g|

Mass of tablet| 3. 21g|

Mass of bag and reactants| 30. 305g|

Mass of bag and products| 28. 14g|

Table 2: CaCl2, NaHCO3, and Water|

Mass of carrier and dried reactants| some. 09g|

Volume of water| 25mL|

Mass of water| twenty-four. 925g|

Total mass of handbag and reactants| 29. 015g|

Mass of bag and products| 27. 37g|

* Analysis/Conclusion

A. Evaluation Questions:

1 . How can the beliefs for the overall mass after and before each reaction demonstrate what the law states of conservation of mass? The ideals seem to be inside the same basic value 2 . What were three observations you manufactured that indicated a reaction acquired occurred in component A? The tablet begun to fizz, the bag started to fill with gas, therefore you could hear the tablet reacting together with the water. 3. An sign changes color when the acid of a solution changes. What evidence is there that such change took place in Part W? The general indicator converted to a yellow-colored orange color 4. Did the reaction partly B be a little more acidic or basic? Even more acidic

B. Conclusion: The lab showed us which the Law of Conservation of Mass is correct. I feel that there were some blunders in the research laboratory. The size of the size we were employing was not adequate to fit the whole bag on for evaluating. I feel that this kind of affected the results we recorded intended for mass. Basically were to redo this research I would make sure to use a greater scale. I feel the data was also impacted by extra surroundings left in the bag. The results are close enough to show that the Rules of Preservation of Mass is possible although when you have into accounts the problem we had with the laboratory.

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