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The penny was dissolved to make aqueous copper ions and four copper dilutions were made from stock solution. Each cuvette sample was measured in a colorimeter and the data was plotted linearly using Beer's law plot. Mass percent and percent error were found using calculations. Analysis of class data provided further data to determine the copper and zinc composition percentages.
Experimental Procedure. A penny was weighed on a digital scale. About 15 mL of 10 M HNO3 was measured and placed into medium sized beaker. The beaker was placed under the fume hood and penny was added to the solution. The solution was diluted to 25...
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