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Living by Chemistry

Angelica M. Stacy

Chapter 8

Molecules in Action - all with Video Answers

Educators


Section 1

Attractions between Molecules

00:39

Problem 1

Explain in your own words what a polar molecule is.

Catherine Lemar
Catherine Lemar
Numerade Educator
01:00

Problem 2

What are intermolecular attractions?

Catherine Lemar
Catherine Lemar
Numerade Educator
02:01

Problem 3

Write a lab report for the Lab: Attractions Between Molecules. In your conclusion, explain why some liquids were attracted to the wand and others were not, and why some liquids beaded up on waxed paper while others did not.

Catherine Lemar
Catherine Lemar
Numerade Educator
02:20

Problem 4

Methanol, $\mathrm{CH}_{3} \mathrm{OH},$ is attracted to a charged wand. The hydrogen atoms have a partial positive charge and the oxygen atom has a partial negative charge.
a. Draw a picture showing how you predict the methanol molecules are oriented when they are attracted to a wand with negative charges.
b. Do you expect methanol to bead up or spread out on waxed paper? Explain your thinking.
c. Do you expect methanol to dissolve in water? Explain your thinking.

David Collins
David Collins
Numerade Educator
03:16

Problem 5

Hexane, $\mathrm{C}_{6} \mathrm{H}_{14},$ is not attracted to a charged wand and it spreads out on waxed paper. Do you expect hexane to dissolve in water? Explain your thinking.

Ronald Prasad
Ronald Prasad
Numerade Educator
01:48

Problem 6

Explain why no liquids are repelled from a charged wand.

Ronald Prasad
Ronald Prasad
Numerade Educator