Purpose: The purpose of this lab is to prove and discern the empirical formula of copper oxide using the Law of Conservation of Mass. This states that in measuring the mass of each component of copper oxide and determining the percent composition of each the copper and the oxygen within copper oxide it is possible to find the ratio of the elements within the compound.
Procedure: In order to conduct this lab, 25.1mL of distilled water then 25.5mL of 3M HCl must be added 2.11g of copper oxide. This solution must be stirred until it’s dissolved then continuing for stirring until the reaction is complete and the solution is colorless. Once, colorless, add 3.0220g of zinc metal. Next, filter the solution using a Büchner funnel setup and filter paper. Finally, after drying the filter paper and copper overnight, weigh and record the mass.
Conclusions:
In completing this experiment, it can be concluded that the law of conservation of mass is present in this lab in that the mass of the sample is conserved in decomposition of copper oxide where if the masses of copper and oxygen are combined their masses will approximate to the original mass of the copper oxide sample. As the data indicates that the empirical formula of copper oxide is CuO5, it can be …show more content…
This percentage can be attributed to the fact that during the reaction not all of our copper oxide was able to react leaving behind unreacted chunks of zinc leading to a lessened mass of copper. In addition, while filtering our solution, there was presented a random error where some additional copper mass was lost during filtration leading to a lessened mass of copper. These errors contributed to the excessive mass of oxygen released during the experiment and the lessened mass of copper. Finally, there could be a possible systematic error where our weighing scale was inaccurate and imprecise causing the mass measurements to be
Procedure: In order to conduct this lab, 25.1mL of distilled water then 25.5mL of 3M HCl must be added 2.11g of copper oxide. This solution must be stirred until it’s dissolved then continuing for stirring until the reaction is complete and the solution is colorless. Once, colorless, add 3.0220g of zinc metal. Next, filter the solution using a Büchner funnel setup and filter paper. Finally, after drying the filter paper and copper overnight, weigh and record the mass.
Conclusions:
In completing this experiment, it can be concluded that the law of conservation of mass is present in this lab in that the mass of the sample is conserved in decomposition of copper oxide where if the masses of copper and oxygen are combined their masses will approximate to the original mass of the copper oxide sample. As the data indicates that the empirical formula of copper oxide is CuO5, it can be …show more content…
This percentage can be attributed to the fact that during the reaction not all of our copper oxide was able to react leaving behind unreacted chunks of zinc leading to a lessened mass of copper. In addition, while filtering our solution, there was presented a random error where some additional copper mass was lost during filtration leading to a lessened mass of copper. These errors contributed to the excessive mass of oxygen released during the experiment and the lessened mass of copper. Finally, there could be a possible systematic error where our weighing scale was inaccurate and imprecise causing the mass measurements to be