5.3

Question 1

What is hydrogen bonding?

Answer 1

A strong dipole-dipole interactions between two molecules that each contain an O-H,N-H,F-H

Question 2

Define dipole-dipole?

Answer 2

Attractive forces between the opposite ends of 2 polar molecules

Question 3

What is london dispersion forces?

Answer 3

Temporary attraction between other atoms and molecules

Question 4

Rank the three types of bonds from strongest to weakest

Answer 4

Strongest - Hydrogen bonding
Mid - Dipole-dipole
Weakest - London Dispersion Forces

Question 5

How do molecules become polar?

Answer 5

Polar molecules must contain a polar covalent bond and asymmetrical ends.

Question 6

What is delta?

Answer 6

The absolute value difference

Question 7

What results in a larger partial charge?

Answer 7

A larger electronegativity

Question 8

How can we determine if the molecule is polar or non-polar?

Answer 8

We draw the dipole movements for the molecule to see if they cancel out and then we also observe the forces.

Question 9

How can we determine if a molecule will be soluble in water based on its structure?

Answer 9

By looking at the molecule structure and if the ends are hydrophilic or hydrophobic

Question 10

What type of interactions can polar molecules have?

Answer 10

London Dispersion Forces, Dipole-Dipole and Hydrogen Bonds

Question 11

Are polar molecule soluble in water? Why?

Answer 11

Yes, the uneven electron density in polar molecules allows them to form hydrogen bonds with the water molecules