The purpose of this lab was to understand the Law of Conservation of Mass and how it works, using half of an Alka-Seltzer tablet, concealed in a water to fill the container, while a balloon sealed the top to keep it a closed system. The hypothesis was, if the Alka-Seltzer chemical reaction is a closed system, then the mass of the products will equal the reactants. The data did not support the hypothesis because the products were almost always a different mass to the reactants but only the last trial revealed that the mass of the reactants was equal to the products. Usually, the trials indicated a loss of mass until the third trial was done, which was a success. Since the experiment was a closed system, matter could not leave or enter. This
