2.4 Intermolecular Forces

Question 1

London dispersion forces

Answer 1

temporary dipoles are formed by the movement of electrons within a molecule
can happen between any two molecules

Question 2

dipole-dipole interactions

Answer 2

every polar molecule has a dipole and they attract each other

Question 3

hydrogen bonds

Answer 3

strong dipole-dipole interaction
require O-H, N-H, or F-H

Question 4

weakest to strongest in solution

Answer 4

London dispersion forces: temporary dipoles, weak partial charges
dipole-dipole interactions: permanent dipoles, stronger partial charges
hydrogen bonds: permanent dipoles, strongest partial charges
ionic: permanent dipoles, full charges
covalent: bonds not broken in water

Question 5

water

Answer 5

polar
london dispersion, dipole-dipole, hydrogen bond
soluble in water

Question 6

methyl alcohol

Answer 6

polar
london dispersion, dipole-dipole, hydrogen bond
soluble in water

Question 7

ethyl alcohol

Answer 7

polar
london dispersion, dipole-dipole, hydrogen bond
soluble in water

Question 8

acetic acid

Answer 8

polar
london dispersion, dipole-dipole, hydrogen bond
soluble in water

Question 9

hexane

Answer 9

nonpolar
london dispersion
not soluble in water

Question 10

oil

Answer 10

nonpolar
london dispersion
not soluble in water