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| Experiment 1 | Structure-Solubility Relationships for Alcohols |
Notes
The Notes section contains supplemental information about lab procedures. The notes are placed on a separate page so that the operations in the lab procedure are easier to follow, but the notes should always be consulted.
"Chemical equation" is a required element in your notebook, but it doesn't make sense to draw an equation for this experiment because you are not attempting a chemical reaction. Instead of drawing an equation, draw structural formulas of all of the organic liquids used in this experiment and write their names next to them.
Distilled water is available at the sink (black-handled faucet) next to the reagent hood on the east wall. You can save everyone's time by collecting 200-300 mL distilled water in a large flask or beaker and using this stock for several solubility measurements. Note: fossil fuels are burned to produce distilled water. Please help us conserve energy resources by carefully closing the spigot after each use.
You can perform your measurements like any titration. First, try adding a significant amount of alcohol (2-3 mL). If the alcohol fails to dissolve, record the result, dispose of your sample and try again with a much smaller aliquot (perhaps just a 0.5 mL). On the other hand, if the alcohol appears to dissolve, try adding another significant aliquot. The point is to quickly get a rough idea of what amount you are trying to measure and then, if necessary, measure this amount more carefully in a second (or third) experiment.
We sometimes need to share the computers in Rm. 203 with Chem 101 students. If that provides necessary, be prepared to interrupt your solubility measurements in order to perform the computer work. You will be able to return to your measurements afterwards.
