SCH4U - Chemistry 12 (2024-25) - A

SCH4U-25A

1-4F: Lewis Structure and VSEPR Practice Questions

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In this activity, let's try some practice problems!

Answer the following questions and check your answers below. These problems are for practice only will not be graded.

Be sure you know how to draw correct Lewis Dot Structures and are able to correctly predict the electronic arrangement and molecular geometry before going on to the lab assignment.

Remember, formal charges can sometimes help you decide which is the best Lewis Dot Structure when there is more than one possible structure.
 

  1. Draw the best Lewis Dot Structure for each of the following species.

a)      BeF2

b)      BCl3

c)      CCl4

d)      PBr5

e)      SI6


  1. Give the name of the electronic arrangement and the name for the molecular geometry for each of the species in question #1.
     
  1. Draw the best Lewis Dot Structures for each of the following species.

a)      BH2–

b)      NI3

c)      ClF4+

d)      SF5–


  1. Give the name of the electronic arrangement and the name for the molecular geometry for each of the species in question #3.


Solutions:



Source: Purdue Chem