Chapter 2 Polarity, Intermolecular Forces And Physical Properties

Front 1

Which has a higher bond dipole:
HF or HCl?

Back 1

HF

Front 2

What is a bond dipole?

Back 2

When electrons shift to the more electronegative atom, creating different charges between the atoms involved in the bond.

Front 3

What is the molecular dipole?

Back 3

The sum of all bond dipoles

Front 4

A larger difference in electronegativities gives a higher or lower bond dipole?

Back 4

Higher

Front 5

Rank from highest to lowest the strength of the following intermolecular forces:
hydrogen bonding, ion-ion, dipole-dipole, ion-dipole, van der Waals/dispersion forces.

Back 5

Ion-ion, ion-dipole, hydrogen bonding, dipole-dipole, Van der Waals.

Front 6

True or false: All things being equal (ie functional groups), the bigger heavier compound will boil at higher temperatures.

Back 6

True

Front 7

Explain solubility of ionic compounds in polar solvents using intermolecular forces.

Back 7

Because of ion-dipole intermolecular forces, ions are attracted by the dipole charges of polar solvents, which in the masses overcome the original ionic bond.

Front 8

Hydrocarbons rely on which intermolecular forces?

Back 8

Van der Waals forces (temporary dipoles, weak)

Front 9

Do alkanes have relatively high boiling points?

Back 9

No, because they have weak bonding (Van der Waals)

Front 10

Why does a linear isomer of a molecule have a higher boiling point than a "spherical" isomer of the same molecule?

Back 10

Geometrically it is able to "stack" and have larger surface area to interact more.

Front 11

Organic molecules with discreet ions usually ______ before boiling (or even melting)

Back 11

decompose

Front 12

Molecules with less branching (linear molecules) have higher/lower boiling points.

Back 12

Higher

Front 13

Will functional groups that can hydrogen bond with water be somewhat soluble?

Back 13

Yes