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Unformatted text preview: n solution is tested separately for the presence of
potassium and calcium. How will you perform these tests? 36 PROCEDURE
Part II. Qualitative Analysis – Analysis of an Unknown Mixture
1. Obtain an unknown cation solution from your TA. The unknown solution
contains 5 cations.
2. Note the initial color of your unknown solution. How does this compare to the
colors of the original known solutions? What cations are likely to be present in
3. Record your Unknown # (based on locker #) in your Lab Notebook.
4. Follow the same steps as Part I until you have confirmed all 5 unknown cations.
5. Perform the Final Confirmation for your unknown (see below).
Final Confirmation Steps
1. Once you have determined the 5 cations present in your solution, mix up a
‘theoretical unknown solution’ containing 1mL of each of the known cations that
you think are present in your unknown solution.
a. Place 1 mL of this solution in a centrifuge tube.
b. Place 1mL of your original unknown solutio...
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This note was uploaded on 04/09/2013 for the course CHE CHE 2C taught by Professor Nasiri during the Spring '07 term at UC Davis.
- Spring '07