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Molecular Structure Practice Questions

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Updated on Sep 24, 2011

Review the following concepts if needed -  Molecular Structure Study Guide

Practice Questions

Write the Lewis structures for the following molecules:

1. SiH4
2. AlCl3
3. HCN
4. NH3
5. HClO3 (Hint: Acidic hydrogens are attached to a oxygen.)
6. H2CO (Hint: There are no acidic hydrogens.)
7. XeF4

 

Using VSEPR, predict the shape for the following molecules or ions.

8. AlCl3
9. O3
10. H2CO
11. SnH4
12. XeOF4
13. SF4

 

Show the resonance structures for the following molecules or polyatomic ions.

14. O3
15. CO3 2–
16. HNO3
17. SO32–

 

Give the formal charge for each atom in the following molecules or polyatomic ions.

18. SO4 2–
19. CO3 2–
20. HNO3
21. SO3 2–

 

Identify the dipole for each of the following bonds:

22. H-Si
23. C-F
24. B-Cl
25. S-F

 

Predict whether each of the following molecules has a dipole moment:

26. PCl3
27. BF3
28. CH3Cl

 

Answers

1.
Molecular Structure
2.
Molecular Structure
3.
Molecular Structure
4.
Molecular Structure
5.
Molecular Structure
6.
Molecular Structure
7.
Molecular Structure
8. Trigonal planar
9. Bent
10. Trigonal planar
11. Tetrahedral
12. Trigonal bipyramidal
13. Seesaw
14.
Molecular Structure
15.
Molecular Structure
16.
Molecular Structure
17.
Molecular Structure
18.
Molecular Structure
19.
Molecular Structure
20.
Molecular Structure
21.
Molecular Structure
22.
Molecular Structure
23.
Molecular Structure
24.
Molecular Structure
25.
Molecular Structure
26. Net dipole exists
27. No net dipole
28. Net dipole exists
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