Survey-IMF-2020 - This is extra material for practice PDF

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This is extra material for practice...

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Please DO NOT write your name on this questionnaire Rank the following in order of increasing boiling points.

3

1

6 5 2

4

What strategies did you use to solve the above problem? Please explain. • • •

I looked for the number of carbons, generally more carbons means higher boiling point I looked for hydrogen bonding and dipole- dipole interactions I looked for the number of branches. More branches means the molecule has a lower boiling point

Identify the main intermolecular forces (IMFs) in the following molecules: London dispersion H2SO4 Hydrogen

Hydrogen

NaCl Dipole- Dipole

Dipole- Dipole London dispersion

What strategies did you use to identify the IMFs in the molecules shown above? Please explain.

•

London dispersion forces are usually in nonpolar molecules

•

Hydrogen bonding usually occurs within hydrogen and fluorine, oxygen or nitrogen

•

Dipole- dipole forces are usually between polar covalent molecules

Arrange the following molecules from lower to greater Dipole-Dipole interaction. H—F H—Br H—I H—Cl

H—I < H—Br < H—Cl< H—F List some challenges you faced while learning about Intermolecular Forces. •

Determining which elements are there by looking at the structures

Why do you think IMFs problems are challenging? Can you give an example? Intermolecular forces problems may be challenging when you don’t really understand the difference between dispersion forces, dipole dipole forces and hydrogen bonding. You would have difficulty labeling something as a dipole dipole interaction if you can’t tell whether or not the molecule is polar or nonpolar. Dipole dipole interactions usually occur between polar covalent molecules.

How do you think you can improve your learning and understanding of IMFs. I would have to continue doing practice problems on them to deepen my understanding.

Can you give a thorough explanation on how to solve for intermolecular forces problem? To solve an intermolecular force problem, you would have to look at the molecule or structure and determine what bonds it has and whether is it polar or nonpolar. Nonpolar molecules would most likely have dispersion forces. Molecules bonded to hydrogen like fluorine, nitrogen, and oxygen would be hydrogen bonding. Dipole dipole interactions would be between covalently bonded structures.

For the following questions please select the box that is most appropriate: Intermolecular Forces are a difficult part of chemistry. ☐ Strongly Disagree ☐ Disagree ☒ Neutral ☐ Agree ☐ Strongly Agree

I am unsure when performing an IMFs problem. ☐ Strongly Disagree ☐ Disagree ☒ Neutral

☐ Agree

☐ Strongly Agree

Memorization was a large part of learning about IMFs. ☐ Strongly Disagree ☒ Disagree ☐ Neutral

☐ Agree

☐ Strongly Agree

Lewis Structures are important for solving questions about IMFs. ☐ Strongly Disagree ☐ Disagree ☐ Neutral ☐ Agree

☒ Strongly Agree...