Stephen Wilson (SID: 18974524)
GSI: Timothy Fei
Experiment #4
March 17
th
, 2008
Chem 3AL Section 111
Whittling Down The Possibilities
Purpose:
The purpose of this lab was to utilize different methods to pinpoint the identity of an
unknown solution by matching the results to pre-collected information.
Methods:
Each group was given a set of four unknown vials to find four properties of each; dipole
moment, solubility in water, density relative to water, and boiling point. We first tested to see if
the unknown solution had a dipole moment by squirting it next to an electrostatically charged
plastic rod, if the liquid curved toward the rod, then it had a dipole moment.
The next test was to find if it was soluble in water, to do this we put equal amounts of
both liquid and water in a test tube, then pulled it all into a Pasteur pipette and squirted it back
into the test tube violently. We repeated this three times then recorded whether or not it was two
layers or not, with two layers meaning it was not soluble.
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- Spring '08
- Li
- Organic chemistry, pH, partner, Sodium chloride
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