Chem 11 IB

Intermolecular Forces Simulation Assignment

Today you will be using computers to research a topic.

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You are required to make your own notes on the following.

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YOU MUST include diagrams and drawings where given to act as visuals.

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These notes will be for marks so use pencil crayons and add colour to your work.

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Please make sure to include a title and date on the top of every new page.

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Only PARTS A and B will be marked.

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These notes are due tomorrow .

NEATLY make your own notes on the following:

PART A

1.

Click on:

http://www2.wwnorton.com/college/chemistry/gilbert/overview/ch9.htm

and scroll down the page to click on

“Intermolecular Forces Tutorial” (it is in green). Using the play (triangle), navigate through these questions.

a.

What are intermolecular forces (IMF)? Which macroscopic properties do they determine? Push play to continue.

b.

Draw two water molecules illustrating intra and intermolecular forces. Push play to continue.

c.

What is an ionic bond? What is the IMF for ionic compounds? Push play to continue.

d.

How can the strength of ion-ion forces be determined? Give an example and explain. Push play to continue.

e.

What IMF act between two polar molecules? Give an example. Push play to continue.

f.

What happens to the IMF when the polarity of the molecule increases? Push play to continue.

g.

What is hydrogen bonding? When does it occur? Give an example. Push play to continue.

h.

What are dispersion forces? Give an example.

i.

What is an induced dipole? Give an example. Push play to continue.

j.

Rank all IMF from stronger
weaker IMF.

k.

What does miscible and immiscible mean? What determines if substances will be soluble in other substances?

l.

What are ion-dipole forces? Give an example. Push play to continue.

Questions:

a.

Rank the following substances from strongest to weakest IMF. (He, NH

3

, NF

3

, NaCl)

b.

Rank the following substances from strongest to weakest IMF. (HF, F

2

, FCl)

c.

Rank the following substances from strongest to weakest IMF. (NaCl, MgCl

2

, AlCl

3

, MgS, NaBr)

d.

Are ammonia (NH

3

) and water (H

2

O) miscible? Push play to continue.

e.

Would you expect KBr to be a solid, liquid or gas at room temperature?

PART B

1. Click on the following: http://www.ausetute.com.au/molpolar.html

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What are non-polar and polar bonds? Give an example of each.

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Explain how symmetry is involved in determining if bonds are polar or non-polar. Give examples.

2. Explain why the following are polar or non-polar molecules: H

2

, NCl

3

, CO

2

, AlCl

3

, CH

4

, HCN, H

2

O, NH

3

.

Draw partial charges as part of your explanation.

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