Results:
1. Which samples are definitely polar? How do you know?
2. Which samples are definitely non-polar? How do you know?
3. From the data, what can you conclude about the polarity of ethanol?
4. Would you expect ethanol to dissolve in water? How about in hexane?
5. Classify the following as non-polar or polar molecules. Then, predict their solubility in each solvent.
| | Type of Molecule | Solubility in Water | Solubility in Hexane |
| NH3 | | | |
| I2 | | | |
| HCl | | | |
6. Why do ionic materials dissolve so well in water, but not in hexane?
Enrichment: Atmospheric gases such as oxygen, nitrogen and carbon dioxide are capable of dissolving in water. Make a prediction regarding how much you expect these gases to dissolve based on their polarity. See if you can find or think of at least one reason why oxygen and carbon dioxide need to be able to dissolve in water for aquatic life to flourish.
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