Experiment+9+The+Copper+Cycle

=Experiment 9: The Copper Cycle=

Literature about the experiment
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Procedure
bold = hazardous step, the equivalent of :( on the handout

1. Measure approximately 0.1000 g of copper and place into a clean, labeled 250 mL beaker.


 * 2. In the hood, carefully measure 2.0 mL of 8 M Nitric acid and slowly add it to the copper. Carefully swirl the beaker until the chemical reaction is completed.**


 * 3. Remove the beaker from the hood and carefully take to your lab table. Add approximately 25 mL of distilled water. Next, slowly add 2.0 mL of the 8 M sodium hydroxide to the beaker. Observe the sample closely.**


 * 4. Place the beaker on a hotplate (set to 5) and stir occasionally until a solid appears in the beaker.**

5. Using beaker tongs, move the beaker to the lab table and allow to cool.

6. Filter the solution

7. Gently scrape the solid from the filter paper into the 100 mL beaker.


 * 8. While stirring, slowly add 15 mL of 1 M sulfuric acid to the beaker.**

9. Add approximately 0.1 g of zinc fillings to the beaker and stir until a color change occurs.

10. Decant off the liquid and dispose of as directed.

11. Add approximately 10 mL of water to the beaker to rinse the sample. Repeat as needed until the sample is clean.

12. Measure the mass of the solid.