Copper Cycle

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Submitted By Flyhle
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Copper Cycle
The copper cycle involves many different type of reactions. In this lab you will investigate the various types of reactions that are used to complete the cycle. Solid copper will be added at the beginning of the reactions. Due to the law of conservation of matter the amount of copper put into the reaction should also come out of the reaction at the end.
The reactions that you will perform are generally outlined in the following cycle:

Reactions:
1. 8HNO3 (aq) + 3Cu (s) + O2 (g)  3Cu(NO3)2 (aq) + 4H2O (l) + 2NO2 (g)
2. Cu(NO3)2 (aq) + 2NaOH (aq) 
3. Cu(OH)2 
4. CuO (s) + H2SO4 (aq) 
5. CuSO4 (aq) + Zn (s) 
Materials:
250 mL beaker Aspirator H2O
Glass funnel Rubber tubing 15 mL - 6.0 M Sulfuric Acid
Ring stand Bunsen burner 2.0 g Zinc powder
Ring  0.5 g copper wire 10 mL - 6 M Hydrochloric Acid
Wire Gauze 4.0 mL - 16 M Nitric Acid
Finger clamp 30 mL - 3.0 M NaOH

Set-Up:
1. Create a fume hood from a funnel surgical tubing and aspirator.
2. Support the 250 mL beaker with a ring and wire gauze.
3. Connect the funnel with a finger clamp over the 250 mL beaker.
4. Connect hose to funnel and aspirator (fume hood maybe used in lieu of funnel and aspirator set-up).

Procedures:
1. Mass a 250 ml beaker and record in the data table.
2. Mass out approximately 0.500 grams of no. 16 copper wire and record the mass of the copper in the data table and place the copper in a 250 mL beaker.
3. Acquire 4 to 5 mL of Nitric Acid in a graduated cylinder from your instructor.
4. Start the aspirator and pour the HNO3 into the beaker with the copper. (Caution fumes that are given off in this reaction are poisonous. If some of the acid makes contact with your skin quickly rinse the contaminated area.)
5. Record your observations of the first reaction…...

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