whittling down the possibilities

whittling down the possibilities - Nadia Garcia Chem 3AL,...

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Nadia Garcia Chem 3AL, Sec. 301 3/10/09 Experiment 4: Whittling Down the Possibilities The purpose of this experiment was to use various characteristics of unknowns, such as dipole moment, solubility, density, and boiling points to identify them. There were many steps to this laboratory, and each one got us closer to discovering the identity of a particular unknown. We began by testing each unknown to see if it had a significant dipole moment. It turned out that three of our four unknowns were diverted towards the charged rod, indicating that there was a significant dipole moment. However, this does not let us determine the identity of an unknown with much confidence, since there are many chemical compounds that have a dipole moment and we cannot identify based solely on that characteristic. Another crucial step to determining the identity of the unknowns was looking at solubility in water. Again, it is not possible to determine the identity of the unknown solely based on whether it is soluble in water or not, but this can take us to another step. If the compound is not soluble in water, we can then look at the density to get closer to determining it's identity. If the unknown, floats on water, it
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whittling down the possibilities - Nadia Garcia Chem 3AL,...

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