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Procedure: 1. Obtain about a 5-cm length of copper wire and make it into a small coil by wrapping it around a pencil. Place it in the crucible and add powdered sulfur into the crucible until the copper is almost completely covered. Cover the crucible and place it on a clay triangle on an iron ring for heating. This experiment must be done in the hood because of the noxious sulfur dioxide that will form. Heat the crucible until all the sulfur is burned off, when the crucible stops smoking. Use crucible tongs to remove the crucible and place it on a wire gauze to cool. Uncover the crucible after it has finished cooling and observe the contents, writing them down for question 1-4. 2. Place a small portion of the product created from step 1 in a test tube and add 2 mL of 6 M NH3 in the hood. Heat gently with a Bunsen burner. Answer questions 5-7. 3. Add a small piece of zinc to a test tube containing 2 mL of 6 M HCl and note what happens. Answer question 8-9. 4. Place a 1-in. piece of copper wire in a clean test tube; add 2 mL of 6 M HCl and note if a reaction occurs. Answer questions 10-11. 5. While holding a clean test tube in the hood, place a 1-in. piece of copper wire in it and add 1 mL of concentrated nitric acid, HNO3. Answer question 12-14. After the reaction has proceeded for 5 minutes, add 5 mL of water. Answer question 15. 6. Place 1 mL of 0.1 M Na2C2O4 in a clean test tube. Add 10 drops of 6 M HSO4. Mix thoroughly. To the resulting solution add 1 to 2 drops of 0.1 M KMnO4 and stir. If there is no obvious indication that a reaction has occurred, warm the test tube gently in a hot water bath. Answer question 16.
Approximate Word count = 1277
Approximate Pages = 5.1
(250 words per page double spaced)
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