B-4 Intermolecular Attractions

Question 1

Which two feature impact the strength of Coulombic attractions in an ionic compound?

Answer 1

Size of the charges and ionic radius

Question 2

Which has a greater Coulombic attractions, A⁺¹B^-1 or C⁺²D^-2? The ionic radius of each ion is similar.

Answer 2

C⁺²D^-2

Question 3

Which has a greater Coulombic attractions, A⁺¹B^-1 or E⁺¹B^-1? The ionic radius of E⁺¹ is smaller than each ion is less than the ionic radius of A⁺¹.

Answer 3

E⁺¹B^-1

Question 4

Which has a greater Coulombic attractions, A⁺¹B^-1 or A⁺¹F^-1? The ionic radius of F^-1 is larger than the ionic radius of B^-1.

Answer 4

A⁺¹B^-1

Question 5

Which type of intermolecular interaction can be described as a temporary dipole that forms between adjacent molecules?

Answer 5

London Dispersion Forces

Question 6

Which of the following would have larger London Dispersion Forces, small molecules ot large molecules?

Answer 6

Large molecules have more electrons so more opportunity for random motions to cause a temporary diploe to form.

Question 7

Which of the following would have larger London Dispersion Forces, straight chain hydrocarbon or a globular hydrocarbon of the same molar mass?

Answer 7

Straight chain hydrocabons have more surface where temporarary dipoles can form and attract other nearby molecules.

Question 8

Polar or nonpolar?

Answer 8

polar

Question 9

Polar or nonpolar?

Answer 9

nonpolar

Question 10

Polar or nonpolar?

Answer 10

nonpolar

Question 11

Polar or nonpolar?

Answer 11

polar

Question 12

Polar or nonpolar?

Answer 12

nonpolar

Question 13

Polar or nonpolar?

Answer 13

nonpolar

Question 14

Polar or nonpolar?

Answer 14

polar

Question 15

Polar or nonpolar?

Answer 15

polar

Question 16

Polar or nonpolar?

Answer 16

nonpolar

Question 17

Polar or nonpolar?

Answer 17

nonpolar

Question 18

Polar or nonpolar?

Answer 18

polar

Question 19

Polar or nonpolar?

Answer 19

polar

Question 20

Polar or nonpolar?

Answer 20

polar

Question 21

Polar or nonpolar?

Answer 21

polar

Question 22

Polar or nonpolar?

Answer 22

nonpolar

Question 23

Polar molecules, generally, have stronger or weaker intermolecular attractions that non polar molecules of simlar size.

Answer 23

stronger

Question 24

This is an unusually strong type of dipole-dipole interaction that occures btween N, O, or F atoms and hydrogens that are bonded to N, O, or F atoms.

Answer 24

hydrogen bond

Question 25

This type of interaction occurs during the dissolving of an ionic substance in water.

Answer 25

Dipole-ion interaction