CHM 111 The Copper Cycle Sp16 - THE COPPER CYCLE OBJECTIVES...

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Chemistry: The Molecular Science
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Chapter 11 / Exercise 77
Chemistry: The Molecular Science
Moore/Stanitski
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1 | Experiment: The Copper Cycle THE COPPER CYCLE OBJECTIVESTo observe the chemical properties of copper through a cycle of chemical reactions, including oxidation-reduction, precipitation, decomposition, and acid-base reactions. To use a variety of separation and recovery techniques to isolate copper-containing compounds from solution. To calculate percent recovery of copper through a cycle of chemical reactions. INTRODUCTION &BACKGROUNDCopper is a valuable and versatile element capable of forming a variety of compounds in both nature and the laboratory environment. In its elemental form, copper is a soft metal with a characteristic shiny red-brown hue, and is valued for its use in jewelry and metal alloys such as bronze and brass. Although relatively unreactive toward air oxidation and simple inorganic acids, copper can be oxidized by stronger oxidizing agents, allowing for formation of a variety of colorful (frequently blue or green) inorganic compounds. In the lab, copper’s versatility can be observed through a cyclical series of redox, precipitation, acid-base, and decomposition reactions. Performing this “cycle” of reactions permits students to gain experience in a variety of laboratory techniques, while demonstrating the challenges to efficient recovery of chemical products in small-scale reactions. Originating with metallic copper, the sequence of compounds formed in this experiment is shown in the diagram below: Cu (s)Cu(NO3)2(aq)Cu(OH)2(s)CuO (s)CuSO4(aq)Reaction A Reaction B Reaction C Reaction D Reaction E
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Chemistry: The Molecular Science
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Chapter 11 / Exercise 77
Chemistry: The Molecular Science
Moore/Stanitski
Expert Verified
2 | Experiment: The Copper Cycle
O (l)
(aq)
l)
l)
aq)
(aq)

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