ch. 9 & 13 Lewis structure, VSEPR, molecular polarity; IMF    test      60 points (1 ec)                    honors chemistry

  1. In regards to ___, sketch the shape of the molecule; justify / rationalize your answer.  [10 points]

a. SeCl4

i. Bond angle(s)  =  ___________

ii. Name of shape of molecule =  __________________

b.  PH3

i. Bond angle(s)  =  ___________

ii. Name of shape of molecule =  __________________

2.  Based on your preceding answer, is it a polar or nonpolar compound ?  justify / rationalize your response.  [6 points]

a. SeCl4

b. PH3

3.  In regards to methane (CH4) and ethane (C2H6),  ___.  [20 points]

a. Identify the type(s) of IMF in each compound; justify your answer.

b.  Which compound has the larger IMF ?  justify / rationalize.

c. Which compound has the larger vapor pressure ?  justify / rationalize.

d.  Which compound has the higher boiling point ?  justify / rationalize.

4.  Identify the type(s) of IMF in  ___; justify / rationalize.  [15 points]

a. CS2

b. SH2

c. NH3

5.  Describe the basis of adsorption chromatography; use / define the terms, stationary phase and mobile phase, in your response.   [10 points]