Percent Yield Of Copper And Calorimetry Essay

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The purpose of this experiment was to calculate the percent yield of copper after conducting series of chemical reactions. To study the % yield of copper in the copper cycle, the initial mass and final mass of copper was measured. The chemical reactions involved in the copper cycle are dissolution, precipitation, dehydration, and oxidation/reduction. First, copper was reacted with in a beaker to form (aq) and . The purpose of the dissolution reaction is to convert the copper into solutes in the forms of dissolved components. The was reacted with NaOH to form the precipitate (s). The purpose of adding NaOH was to use the OH to neutralize excess nitric acid and make it more basic. The litmus paper was used for the pH test to make sure the …show more content…
To perform the dehydration reaction, the solution containing was heated under bunsen burner. This heat breaks down the molecular bonds of to usually from Another dissolution reaction was performed in order to convert Cu into aqueous state by adding 3M sulfuric acid. The two H+ in sulfuric acid reacts with the O in CuO to form This solution was filtered by a vacuum to remove the sulfur. The filtrate contained Cu in an aqueous form and was transfer into a new beaker. Lastly, Zinc was added to the new beaker to reduced Cu (aq) to Cu (s). This is oxidation and reduction reaction because . This copper was recovered through vacuum filtration. After performing these reactions to recover copper, the % yield of copper. Throughout the experiment, some of the Copper was lost due to poor lab techniques. During the dehydration reaction, the copper solution was bubbling. A stir rod was left in the beaker to prevent the bubbling.

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