Chemistry Lab Handout 10 "Molecular Models"

Your Name: ___________________________________ Role:______________

Lab Partners: ________________Role:_____ ________________Role:_____

Problem: How can you determine the structure of a molecule?

Hypothesis: _______________________________________________________

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Materials: Molecular Model Building Kit

Carbon (black) 6 Oxygen (red) 2

Hydrogen (yellow) 10 Chlorine (green) 4

Nitrogen (blue) 2 Sulfur (red) 2

Bromine (orange) 1

8 long sticks, 20 short sticks & 8 springs

Caution: (no special concerns)

Procedure:

1. Assemble each molecule and fill out the observations table. Use the

key above for drawing structural model.

2. Rules for building:

A. All holes must be filled.

B. Use springs only when the bond must be curved to fit.

3. Beginner Molecules:

H₂ Cl₂ O₂ N₂ HCl BrCl HBr

4. Intermediate Molecules:

H₂O CO₂ H₂S NH₃ CH₄ CCl₄ CH₃Cl

5. Advanced Molecules:

C₂H₆ C₂H₄ C₂H₂ C₅H₁₀ CH₃OH C₂H₅OH C₆H₆

Observations:

Formula Electron Dot Diagram Structural Model

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continue on separate paper

Data: (none)

Diagram:

Conclusion: _______________________________________________________

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Questions:

1. What do the sticks and springs represent?

2. All of the elements represented in the kit are what type of element?

3. List one molecule you built that would be called an alkane.

4. What is the formula for the only alkene that you built?

5. What is the formula for the only alkyne that you built?

6. What is the formula for benzene?

7. Why can carbon form such a large variety of compounds?

Answers:

Formula Electron Dot Diagram Structural Model

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Formula Electron Dot Diagram Structural Model

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