Quiz 1 - Intermolecular Forces

Question 1

Sp3 Hybridization = …

Answer 1

Tetrahedral

Question 2

Sp2 Hybridization = …

Answer 2

Trigonal Planar

Question 3

Sp Hybridization = …

Answer 3

Linear

Question 4

Sp3 –> Tetrahedral –> No lone pairs –> …

Answer 4

Tetrahedral

Question 5

Sp3 –> Tetrahedral –> 1 lone pair –> …

Answer 5

Trigonal Pyramidal

Question 6

Sp3 –> Tetrahedral –> 2 lone pairs –> …

Answer 6

Bent

Question 7

Sp2 –> Trigonal Planar –> 1 lone pair –> …

Answer 7

Bent

Question 8

Sp2 –> Trigonal Planar –> No lone pairs –> …

Answer 8

Trigonal Planar

Question 9

Sp –> Linear –> …

Answer 9

Linear

Question 10

Electronegativity differences cause __________ ________ _____________ in bonds.

Answer 10

Electron density polarization

Question 11

Define Polarization

Answer 11

Shifting of electrons within their orbitals in a bond which result in a bond moment

Question 12

A non-symmetrical bond moment results in a __________ __________ ___________.

Answer 12

Molecular dipole moment

Question 13

Define Dipole Moment

Answer 13

Equation…

amount of partial charge) X (distance the partial are separated

Question 14

Dipole moments are reported in units of ________.

Answer 14

Debye

Question 15

1 Debye = _____ (esu) X (cm)

Answer 15

10^-18

Question 16

One electron has a charge of ______________ esu.

Answer 16

4.80x10^-10

Question 17

The Dipole Moment of a molecule with multiple polar bonds is…

Answer 17

The vector sum of all individual bond dipoles

Question 18

You must determine a molecules ____________ before analyzing its polarity.

Answer 18

Geometry

Question 19

T/F A linear molecule could be very different from angular molecules

Answer 19

True

Question 20

What are the different properties that could be affected by the attractions between molecules

Answer 20

• Solubility
• Boiling Point
• Density
• State of Matter
• Melting Point

Question 21

Neutral molecules are attracted to one another through…

Answer 21

• Dipole-Dipole Interactions
• Hydrogen Bonding
• Dispersion Forces

Question 22

Define Dipole-Dipole Forces

Answer 22

Forces that result when polar molecules line up their opposite charges

Question 23

Define Hydrogen Bonding

Answer 23

A strong type of Dipole-Dipole Attraction

Question 24

Hydrogen bonds are strong because…

Answer 24

The partial charges are relatively large

Question 25

When Hydrogen shares electrons with a highly electronegative atom like ____, _____, _____ or _____ it will carry a large _________ ___________ _________.

Answer 25

O, N, F or Cl; partial positive charge

Question 26

Large positive charges on the Hydrogen atom can attract large _______ charges on other molecules.

Answer 26

Negative

Question 27

Even with large partial charges, Hydrogen Bonds are __________ than Covalent Bonds.

Answer 27

10-20 times weaker

Question 28

Define Protic Compounds

Answer 28

Compounds with Hydrogen atoms that are capable of forming Hydrogen Bonds

Question 29

Define London Dispersion Forces

Answer 29

Nonpolar molecules that have negative electrons that are evenly spread out around a positive nuclei which completely balances the charge

Question 30

The electrons in London Dispersion Forces are in...

Answer 30

Constant random motion

Question 31

What occurs if there is an uneven distribution in London Dispersion Forces?

Answer 31

An uneven distribution produces a small (temporary) transient dipole including a temporary dipole in a neighboring molecule

Question 32

The GREATER the surface area of molecules the ______ transient induced dipole attractions.

Answer 32

MORE

Question 33

Polar compounds generally mix well with...

Answer 33

Other polar compounds

Question 34

What is used to give a visual depiction of polarity?

Answer 34

Electrostatic potential maps

Question 35

Hydrogen Bonds are an especially _______ type of Dipole-Dipole Attraction.

Answer 35

STRONG

Question 36

T/F It's not difficult to get a polar compound to mix with a nonpolar compound

Answer 36

False; it is difficult to get a polar compound to mix with a nonpolar compound