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Report Contents and Questions
The purpose should be several sentences stating the reasons for doing this experiment and the criteria used for evaluating success. It should include both concepts and laboratory techniques. The procedure section should cite the lab manual and note any changes that were made to the procedure in the lab manual while performing the experiment.
The data section should include your own personal data, as well as the table below filled in with class data. For your personal data include all observations, the masses, and the supernatant test results, using a “+”, (more precipitate formed) or “-”, (more precipitate did not form). Your personal data should be in a data table similar to that of the class data.
Class Data Table

 

Vol. Cu(NO3)2
(0.50M)

Vol. KI
(0.50M)

Masses of ppt. in test tubes

Cu(NO3)2 Test

KI Test

A

1.0 mL
1.0 mL
1.0 mL
1.0 mL

6.0 mL
6.0 mL
6.0 mL
6.0 mL

 

 

 

B

2.0 mL
2.0 mL
2.0 mL
2.0 mL

5.0 mL
5.0 mL
5.0 mL
5.0 mL

 

 

 

C

3.0 mL
3.0 mL
3.0 mL
3.0 mL

4.0 mL
4.0 mL
4.0 mL
4.0 mL

 

 

 

D

4.0 mL
4.0 mL
4.0 mL
4.0 mL

3.0 mL
3.0 mL
3.0 mL
3.0 mL

 

 

 

E

5.0 mL
5.0 mL
5.0 mL
5.0 mL

2.0 mL
2.0 mL
2.0 mL
2.0 mL

 

 

 

F

6.0 mL
6.0 mL
6.0 mL
6.0 mL

1.0 mL
1.0 mL
1.0 mL
1.0 mL

 

 

 

The balanced chemical equation should be displayed above the data table. The following should be calculated for each group and placed in the class data table a) average moles of product (CuI), b) average moles of Cu(NO3)2, c) average moles of KI, d) theoretical moles of product based on Cu(NO3)2, e) theoretical moles of product based on  KI, f) which reactant is the limiting reagent and g) percent error in moles of CuI.
The calculation section should have sample calculations for the following: a) moles of Cu(NO3)2, b) moles of KI, c) moles of product (CuI),d) average number of moles observed, e) theoretical moles of product based Cu(NO3)2, f) theoretical moles of product based on  KI, g) determination of the limiting reagent and h) percent error of moles of CuI.
Also include a graph of the number of moles of CuI expected vs. the number of moles of KI added. All graphing guidelines apply here. 
The conclusion should be in paragraph form and include a summary of the information determined by performing the experiment. This section should include the findings for each set of solutions. For solutions A-F include the test results, experimental product yield, theoretical yield, the limiting reagent and the percent error. Compare the results of your predicted LR with the results of the tests on the supernatant solutions. Be sure to discuss the variation in the different solutions and what caused the differences. Also discuss what information can be determined from the graph. Finally discuss all sources of error and how they might have affected the results.
Answer the following questions:

  1. How would an increase in the concentration of the reactants affect the moles of reactant?
  2. Explain the role of limiting and excess reagents in an experiment.
  3. Copper compounds are fairly common. Using the internet or any other reliable source, look up at least five other copper compounds. List the name, chemical formula, and uses of each compound. Be sure to cite your source in acceptable format.