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Solids and Liquids Practice Questions

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Updated on Sep 25, 2011

Review the following concepts if needed -  Solids and Liquids Study Guide

Practice Questions

What types of intermolecular forces exist among molecules in each of the following?

1. SO2
2. MgCl2
3. HF
4. benzene (C6H6)

 

What types of intermolecular forces exist among molecules in each of the following pairs?

5. HF and H2O
6. PH3 and H2S
7. CO2 and NaOH

Which compound of the following pairs would you expect to have the highest melting point?

8. CH3CH2OH or CH3OCH3
9. SO2 or SO3
10. HF or HBr
11. Xe or Ar
12. Use Henry's Law to calculate the concentration of carbon dioxide (CO2) in a soda bottle at 25° C if the internal pressure is at 8.0 atm. The Henry's Law constant for CO2(g) at 25° C is 3.4 * 10–2 M/atm.
13. Use Raoult's Law to calculate the vapor pressure of 1.5 mol of sugar in 6.50 mol of water at 25° C. Water has a vapor pressure of 23.756 mm Hg at 25° C.
14. Calculate the boiling point of a solution of 13.4 mol of pentanol (a nonvolatile substance) dissolved in 255 g of diethyl ether. The boiling point of pure diethyl ether is 34.5° C.
15. Calculate the freezing point of a sugar solution of 0.565 mol of C6H12O6 in 325 g of water.

 Answers

1. van der Waals, dipole-dipole
2. van der Waals, dipole-dipole, ion-dipole
3. van der Waals, dipole-dipole, hydrogen bonding
4. van der Waals
5. van der Waals, dipole-dipole, ion-dipole, hydrogen bonding
6. van der Waals, dipole-dipole
7. van der Waals, dipole-dipole, hydrogen bonding
8. CH3CH2OH
9. SO2
10. HF
11. Xe
12. 0.272 M
13. 4.45 M
14. 34.6° C
15. –3.23° C
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