Raccoon

Neil Ms. Parkhurst interpersonal chemistry 10/3/2012 natural law of Conservation of Mass Inquiry laboratory Background In the 19th century, Antoine Lavoisier discovered the equity of Conservation of Mass, the Law of Conservation of Mass states that mass is neither created nor destroyed during ordinary chemic reactions or physical changes. A Closed System rat non exchange any of heat, work, or matter with the surrounding. An coarse System can exchange all of heat, work, or matter. It allows interactions between its internal elements and the environment. PurposeThe purpose of this lab was to designed and complete a laboratory experiment that proves the law of preservation of mass. Procedure First of all, a flask was taking bug out and change in with 15ml of water. The mass of the flask & water was determined and recorded. Then, an Alka seltzer oral contraceptive pill was filled in the water. After a while, placed the flask & water & Alka Seltzer tablet on to the balance pan , the mass of the whole agreement was determined. This procedure was for the open clay. For the close strategy, a flask was taking out and filled in with 15ml of water.The mass of the flask & water was determined and recorded. Then, an Alka Seltzer tablet was placed in a balloon, and put the balloon on the top of the flask, the Alka Seltzer tablet fell into the water. After the reaction was done, mensurable the mass of it, recorded it into the data table. IV. Data Table Data of Law of Conservation of Mass Mass Open system forrader 126. 3g Open system after 126. 09g Closed system before 143. 65g Closed system after 145. 21g Conclusion and Analysis The mass of the open system before was 126. 53g, and the mass of open system after was 126. 09g. The mass of closed in(p) system before was 143. 65g, after was 145. 21g.Both set of data were close enough to release the law of conservation of mass which is the mass were about the same before and after a reaction. According to th e reaction, which was H2O + NaHCO3 = CO2 + H2O + NaOH, showed that at that place were some gas which was CO2 were produced. According to the law of open and closed system, the CO2 were escaped from the open system, on the other hand, it were keep in the closed system. Because of that, the open system was missing some of the mass of gas, it do the first procedure differ from the second procedure.