Report 21.docx - Rochelle Fisher Research Scientist Audrey...

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Rochelle Fisher: Research ScientistAudrey Wagdy: Collaborating ScientistSarah Kooda: Group LeaderMonique Rachell: First AuthorCHE-125 C2/13/2018Lab Report 21: How Much Copper is in The CoinIntroductionA copper mining firm wants to recoup losses from the change in the value of pennies. Our lab is commissioned to develop a method for determining the amount of copper in a penny before 1983and after 1984 and compare the costs of producing the coins using copper and zinc as raw materials with current prices. For our investigation, we used the calculations from a spectrophotometer and scientific equations to determine amounts of copper in dated pennies and compare with a cost analysis with today’s prices of copper. Experimental DesignEquations associated with experimentA=εbC (Beer-Lambert Law)M1V1= M2V2y = mx+bStep by Step1.We measured 2.410g Cu(NO3)23H2O and added enough (approximately 50-70 mL) deionized water to make 100mL. 2.Calibrated Spectrophotometer (Spec 20) per instructions. Determined wavelength at which to run the experiment, 770 nm. Tested 0.1 M solution first3.Diluted 0.1 M Cu2+ to

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