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Chem 3AL - Lab Report #3

Chem 3AL - Lab Report #3 - Kylie 13 July 2010 Chem 3A Lab...

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Kylie 13 July 2010 Chem 3A Lab Experiment #4 Discussion: My partner and I used a process of elimination to deduce the identity of our unknowns; by observing each sample's dipole moment (yes or no), solubility in water (yes or no), and density relative to water (greater than or less than), we were able to compare the results to the pre-lab predictions. These comparisons narrowed down our possible choices to four or less; for example, the four alcohol compounds acetone, methanol, ethanol, and 1-propanol all shared the same predicted data so far and were all possibilities until the last measurement was made. We finally measured the boiling points to find the single match for each sample, and if there were no matches, we repeated the observation process. These deductions were possible since a list of possible identities was provided, and each compound had a unique set of qualitative and quantitative characteristics. All four characteristics had to be observed or measured, since the compounds had overlapping qualities. Samples 1D (cyclohexane) and 2D (ethanol) were easily and accurately identified, with all observations matching the predicted data. Samples 3D (1,2-dichloroethane) and 4D (1-pentanol),
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