The Chemistry of Copper: AP Chemistry Lab Report

Topics: Solid, Crystal, Liquid Pages: 4 (437 words) Published: October 26, 2006
The lab was to include a purpose, procedure, data/observations, all reactions and side reactions written out with qualitative data beneath each product and reactant except H20, and a summary.

The purpose of this experiment is to observe the qualitative aspects of a series of reactions involving copper.

Procedure

1.Measure about 1g of solid copper.

2.Place Cu in Erlenmeyer flask and place flask under

fume hood.

3.Add dropwise 15M HNO3 until solid copper is completely reacted.

4.Place flask in water bath.

5.Add 4M NaOH slowly until no more solid forms.

6.Mix contents by slowly swirling flask.

7.Place flask back in water bath, heat to boiling, and stir.

8.Heat until separation of solid and solution.

9.Cool flask and allow contents to settle.

10.Decant liquid from solid.

11.Wash solid with water and decant again.

12.Add 4M HCl until solid disappears, then add 1-2 ml excess.

13.Add 1g of aluminum to flask.

Data/Observations

1.Start with 1g of orange/bronze solid.

2.When HNO3 is added to Cu a dark orange gas is formed.

3.Clear, blue liquid forms when Cu is fully reacted.

4.Solid blue precipitate forms when NaOH is added.

5.When heated, solution turns black.

6.When settled, a dark crystalline solid can be seen on the bottom, and a clear, colorless solution is on top.

7.When HCl is added, a bluish/green solution forms.

8.When solid Al is added, bubbles form and the intensity of the solution's color diminishes.

9.When reaction is complete, orange/bronze solid and clear, colorless solution is visible.

Reactions

1.

Cu + 4HNO3 =

Orange/Bronze Solid Clear, Colorless Liquid

Cu(NO3) 2 + 2NO2 + 2H2O Clear, Blue Liquid Red/Brown Gas

2.

Cu(NO3)2 + NaOH =

Clear, Colorless Liquid

Cu(OH)2 + 2NaNO3

Blue, Solid Precipitate Clear, Colorless Liquid

3.

Excess HNO3 + NaOH = NaNO3 + H2O

4.

Cu(OH)2 + 2HCl =

Black, Crystalline Solid Clear, Colorless Liquid

CuCl2 + 2H2O...
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