Copper Cycle Report - Therese Nguyen Lab 3 Cycles of Copper...

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Therese Nguyen Lab 3 Cycles of Copper Reactions July 1, 2010
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Abstract Copper metal is carried through five chemical aqueous reactions involving nitric acid (HNO 3 ), sodium hydroxide (NaOH), heat, sulfuric acid (H 2 SO 4 ), and zinc. These reactions are called oxidation-reduction (redox), acid-base and precipitation reactions. In the end, copper was measured to determine the amount recovered. Data Data for the five chemical aqueous reactions are summarized in Table 1 below. Table 1. Mass of Copper Initial Copper Mass Final Copper Mass Recovery of Copper .53 g .63 g 119% Observations for the five reactions are summarized in Table 2 below. Table 2. Observations of Reactions Observation Reaction 1 – Nitric Acid When copper and nitric acid were mixed, the solution turned blue and at times a slight brown hue. Copper was dissolved in nitric acid after a period of one hour. Reaction 2 – Sodium Hydroxide When sodium hydroxide was added to the copper solution, a precipitation was formed. This was copper II hydroxide.
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