Answers to the Practice Problems
(to see how badly you failed)
- While ethanol and water both have hydrogen bonding as their primary IMF's, water has 2 hydrogen bonds compared to ethanol's one, therefore water's boiling point should be slightly above that of methanol.+
- While both Br2 and I2 have London Dispersion forces as their primary IMF's, Br2 has more electrons than I2 and therefore a stronger instantaneous dipole moment than I2. Because of this, while iodine is a gas at STP, bromine is a liquid.+
- Surfactants are polar on one end and non polar on the other. Generally the polar end attaches to the water molecule and the nonpolar end attaches onto the dirt, grease, or other contaminants. This enables it to remove more of the impurities from a surface
- In the chart below.
H2O
CH4 C10H22 He |
0 degrees Celsius
-182 degrees Celsius -30 degrees Celsius -272.2 degrees Celsius |