organic chemistry lab

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PhETMoleculeShapesinhtml5.pdf

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https://phet.colorado.edu/sims/html/molecule-shapes/latest/molecule-shapes_en.html

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CLICK!

Part 1 Directions: Draw pictures of 4 different molecules you create

using bonds and lone pairs. Record geometries and angles, below.

Picture 1

Picture 2

Picture 3

Picture 4

Molecule geometry

Electron geometry

Bond angles

Part 1 Questions:

1. How many bonds can you add total? _____________________________

2. How many lone pairs can you add total? _____________________________

3. How many bonds and lone pairs can you add total? _____________________________

4. How can you make the molecule geometry be DIFFERENT than the electron geometry?

5. Molecules have shape! Make a few and drag and rotate them around. Record below:

Make at least 2 molecules that are 1D or 2D (Draw 2!)

Make at least 2 molecules that are 3D (Draw 2!)

Set-up: Choose “Model”

Check the two “Name” tools and the “Show Bond Angles” box.

Play with the sim adding bonds and lone pairs.

PhET Molecule Shapes html5 Click to run

https://phet.colorado.edu/sims/html/molecule-shapes/latest/molecule-shapes_en.html

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Part 2 Set-up: Click Check boxes:

Part 2 Directions: Turn molecules around

with mouse. Describe each molecule in the

table, below

NH3

CH4

SF4

XeF4

BrF5

PCl5

SF6

AA31 Labs

https://phet.colorado.edu/sims/html/molecule-shapes/latest/molecule-shapes_en.html

Name__________________________________

Period_________________________________

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http://www.clipartbest

.com/clipart-nTXoXjoEc

Part 2 Questions:

1. Can you change the shape of the molecules by twisting them around?

Y or N

2. What happens to the molecules you dragged and twisted?

3. Are the bond angles in part 1 the same as the bond angles in part 2? Why do you think that they are the same/different?

Going Further:

4. Why do you think you cannot get more than 6 things around the central atom?

5. Organic molecules (like CH4) have carbon as the central atom. How many bonds can a carbon central atom support?

6. Is CH4 planar (2D)?

7. DNA is a large organic molecule that has a shape described as a “double helix” shown in a cartoon, right. Given what you know about the carbon molecule’s geometry (Q6) does this shape make sense? Why or why not?

AA31 Labs