Copper Cycle Essay

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Proving the Law of Conservation of Mass using the Copper Cycle Introduction Copper is used in many important industries such as agriculture, petroleum, ceramics, and even in medicine. In this experiment, different forms of copper will be observed throughout the copper cycle. For the experiment, copper will be reacted through the copper cycle where it will go through different reactions in order to return back into pure copper at the starting point of the cycle. The purpose of the experiment is to demonstrate the law of conservation of mass, which states that while matter can change from one form to another, during a given reaction, the total mass must remain the constant. Materials/Equipment: 50 ml beaker, hot plate, plastic funnel, aspirator, rubber tubing, ring stand, clamp, iron ring, weighing boats, magnetic stir bar, disposable pipet(s), filter flask, Buchner funnel, filter paper, distilled water bottle, stirring rod, watch glass, litmus paper- red, 10 ml graduated cylinder. Copper turnings, 6 M HNO3, 6 M NaOH, 3 M H2SO4, Zinc, 6 M HCl Methods: To begin the experiment, the set up was assembled using ring stand, hot plate, rubber tubing, aspirator, funnel, and beaker. A fume hood was created for the reaction. For step 1, copper was obtained. The mass was recorded and transferred to a 50 ml beaker. 4 ml of 6 M HNO3 was added to the beaker containing the copper. For step 2, 10 ml of distilled water was added to the beaker. Then, 6 M NaOH was added to the solution (drop wise), until placing a drop of the solution on red litmus paper turned it blue. For step 3, the solution was heated with a hot plate. The solution was heated until a change in the reaction mix occurred. After that it was heated for another 5 minutes before cooling. For step 4, the liquid was decanted. Then 10 ml distilled water was added. Afterward, about 5 ml of 3 M H2SO4 (drop wise) was

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