Ch. 8 & 9 bonds & VSEPR test [75 points] AP Chemistry

1. SeCl4 [20 points]

a. draw its Lewis structure

b. sketch the molecule

c. what is / are the bond angles in the molecule ?

d. what is the name of the shape of the molecule ?

e. is it a polar or nonpolar compound ? Justify your answer.

 

2. Draw all valid Lewis structures of SiS2. Which is / are the best Lewis structure(s) ? Justify your answer. [10 points]

 

3. Use valence bond theory to describe the bonds in water. If any hybrid orbital(s) is / are needed, then explain why it is needed and describe its formation. [15 points]

4. Using valence bond theory, describe all of the bonds associated with the carbon bound to oxygen in an aldehyde containing a methyl group, 

[structure given, but not shown]

If any hybrid orbital(s) is / are needed, then explain why it is needed and describe its formation. [20 points]

 

5. old topics: Which atom, Si or P, has the greater electron affinity ? Rationalize your answer. [10 points]