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. |
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| 2. |
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| 3. |
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| 4. |
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| 5. |
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| 6. |
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| 7. |
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| 8. | Trigonal planar |
| 9. | Bent |
| 10. | Trigonal planar |
| 11. | Tetrahedral |
| 12. | Trigonal bipyramidal |
| 13. | Seesaw |
| 14. |
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| 15. |
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| 16. |
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| 17. |
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| 18. |
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| 19. |
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| 20. |
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| 21. |
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| 22. |
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| 23. |
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| 24. |
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| 25. |
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| 26. | Net dipole exists |
| 27. | No net dipole |
| 28. | Net dipole exists |
From Chemistry Success in 20 Mintues A Day. Copyright © 2005 by LearningExpress, LLC. All Rights Reserved.
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