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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.

 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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