Lab Report (Experiment 3)

Lab Report (Experiment 3) - Stoichiometry Challenge Copper...

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Stoichiometry Challenge: Copper Compounds William Seo Mitchel Banks, Shan Lee, Deniz Sanli September 20, 2011 CHEM 1211k – C02 I did not share this lab report with anyone after lab.
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Data/Results Chemical Equations: 1. Redox Reaction . 2 Precipitate Reaction 3. Acid/Base Neutralization Reaction 4. Decomposition Reaction 5. Redox Reaction 6. Redox Reaction 7. Redox Reaction Observations : 1. Step A a. After the beaker containing the copper wire and nitric acid was heated, the copper wire reacted with the nitric acid, forming copper (II) nitrate, a soluble solution, nitrogen gas, and water. b. The solution of water, leftover nitric acid and copper (II) nitrate was a blue-ish color. 2. Step B a. Once the sodium hydroxide was added to the beaker containing the copper (II) nitrate, leftover nitric acid and water, a precipitate was formed. b. A drop of the precipitate-containing solution was placed on red litmus paper to determine if it was basic or not—the red litmus paper turned blue/purple indicating that the solution was basic. 3. Step C a. The beaker was placed on heat and this caused energy to react with copper (II) hydroxide yielding copper (II) oxide and water. b. At first, the solution turned incredibly dark, indicating a reaction was occurring, but once the reaction finished, the solid copper (II) oxide settled on the bottom of the beaker. The remaining liquid was colorless after the reaction terminated.
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c. The supernatant liquid was decanted and hot water was poured into the beaker to clean the copper (II) oxide. After this was done, the precipitate was much cleaner than before. 4. Step D a. Once sulfuric acid was added to the copper (II) oxide, the solid copper (II) oxide reacted with the sulfuric acid to form copper (II) sulfate, an aqueous substance, and water. b. The resultant solution was blue-ish in color. 5.
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Lab Report (Experiment 3) - Stoichiometry Challenge Copper...

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