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3.05 Molecular Structure Worksheet
Chemistry lab
Subject
Chemistry
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3 Molecular Structure
Instructions: Fill in each section of this worksheet and submit it to your instructor for grading.
Use the VSEPR geometry chart to complete the activity. Use the grading rubric before you
begin.
Click here to watch the lab completion video. We explain how to fill in the entire worksheet.
Note: You will need to know how to draw Lewis Dot Structures (LDS) based on the number of
valence electrons (lesson 3, pg 4). Review lesson 3, page 4 for writing LDS for covalent
compounds. We explain these in the video above!
Review Questions:
1. Write a statement explaining which characteristics of an atom determine the
VSEPR shape of a molecule (hint: look at the VSEPR geometry chart and what
information we use!).
VSEPR shows the shape of the molecule and the arrangement of the electron pairs and the
atom, This predicts shape and the lone pairs, etc.
2. How does the force between the atoms impact the shape of a molecule?
The force between the atoms determines the shape. For example ionic bonds create crystal
lattice structures and covalent bonds create different shapes depending on the constraints.
1. Activity:
2. The first row is done for you as a model.
3. Compound 4. Draw Lewis
Structure
5. (hand drawn or on
the computer; not a copy
from online) See lesson 3.
6. Use the
VSEPR geometry
chart to determine:
7. Determine the
structures of the
molecule
8. Hint: lesson 3.
9. pg 3
10. Draw the VSEPR
model
11. (hand drawn or on the
computer; not a copy from online)
See lesson 3 pg 3
pg 4
12. H 2 O 13. Total
Domains: 4
14. Bonded
Atoms: 2
Lone Pairs: 2
15. (Generic
formula from the
VSEPR chart above
AX 2 E 2 )
16. Molecular Shape:
Bent
17. Electron
Geometry:
Tetrahedral
18. SiH 4 19. 20. Total
Domains:
21. 4
22.
23. Bonded
Atoms:
24. 4
25. Lone Pairs: 0
26. Molecular Shape:
Tetrahedral
27. Electron
Geometry:
Tetrahedral
28.
29. Br 2 30. Total
Domains:
1
31. Bonded
Atoms: 1
32. Lone Pairs: 0
33. Molecular Shape:
Linear
34. Electron
Geometry:
Linear
35. PCl 3 36. 37. Total
Domains: 4
38. Bonded
Atoms: 3
39. Lone Pairs: 1
40. Molecular Shape:
Trigonal pyramid
41. Electron
Geometry: Tetrahedral
42.
43. CH 3 Br 44. 45. Total
Domains: 4
48. Molecular Shape:
Tetrahedral
50.
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3.05 Molecular Structure
Instructions: Fill in each section of this worksheet and submit it to your instructor for grading.
Use the VSEPR geometry chart to complete the activity. Use the grading rubric before you
begin.
Click here to watch the lab completion video.We explain how to fill in the entire worksheet.
Note: You will need to know how to draw Lewis Dot Structures (LDS) based on the number of
valence electrons (lesson 3.01, pg 4). Review lesson 3.04, page 4 for writing LDS for covalent
compounds. We explain these in the video above!
Review Questions:
1. Write a statement explaining which characteristics of an atom determine the
VSEPR shape of a molecule (hint: look at the VSEPR geometry chart and what
information we use!).
VSEPR shows the shape of the molecule and the arrangement of the electron pairs and the
atom, This predicts shape and the lone pairs, etc.
2. How does the force between the atoms impact the shape of a molecule?
The force between the atoms determines the shape. For example ionic bonds create crystal
lattice structures and covalent bonds create different shapes depending on the constraints.
1. Activity:
2. The first row is done for you as a model.
3. Compound
4. Draw Lewis
Structure
5. (hand drawn or on
the computer; not a copy
from online) See lesson 3.04
6. Use the
VSEPR geometry
chart to determine:
7. Determine the
structures of the
molecule
8. Hint: lesson 3.05
9. pg 3
10. Draw the VSEPR
model
11. (hand drawn or on the
computer; not a copy from online)
See lesson 3.05 pg 3
