Determining Polarity
IMFs Part 1
IMFs Part 2
IMFs Part 3
Extra Info
100
Determine the polarity AND shape of CH4
Nonpolar; Tetrahedral
100
Which is stronger: intermolecular forces or intramolecular forces? For whoever you choose give an example.
Intramolecular: Covalent, Ionic, Metallic.
100
Can a molecule of O2 have a dipole moment?
No it cannot. There is not an electronegativity difference between the two atoms.
100
In a mixture of all molecules, which intermolecular force is always present.
LDF
100
Define intramolecular forces AND give an example of it (through a drawing)
The forces that holder atoms together within a molecule.
200
Determine the polarity AND shape for NH3
Trigonal pyramidal and polar
200
List the three intermolecular forces in order from weakest to strongest.
LDF
Dipole/dipole
Hydrogen bonding
200
Which IMF is created due to the constant motion of electrons creating temporary dipole moments?
London Dispersion Force
200
Which IMF is responsible for water's properties of high surface tension, cohesion, and adhesion?
Hydrogen bonding
200
Define intermolecular forces and give an example of it (through a drawing)
The forces that mediates interaction between molecules.
300
Determine the shape AND polarity of CH3I
Tetrahedral and polar
300
List out the three elements that hydrogen must be bonded with to indicate hydrogen bonding.
Nitrogen, Oxygen, Fluorine
300
What is the strongest IMF in H2O?
Hydrogen bonding
300
Why does PF5 have no permanent dipole even though Fluorine is the most electronegative element on the periodic table?
The molecule is symmetrical so individual dipoles cancel out.
300
Draw a dipole moment for a molecule of HCl, make sure to label the partial positive and negative ends.
400
Determine the shape AND polarity of CO2
Linear and nonpolar
400
Arrange the following molecules from strongest to weakest:
BeF2, H2O, CH3Br
H2O - hydrogen bonding
CH3Br - dipole/dipole
BeF2 - LDF
400
If a molecule is perfectly symmetrical and has no lone pairs on the central atom, what is the strongest IMF?
London Dispersion Forces
400
Who would have a higher boiling point: NH3 or PH3? Explain WHY
NH3 due to hydrogen bonding
400
Draw a dipole moment for NO. Make sure to label the partial positive and negative ends.
500
Determine shape AND polarity of COCl2
Trigonal planar and polar
500
What IMF can these two molecules participate in?
PH3
BF3
London Dispersion Forces
500
What IMF can these two molecules participate in?
Dipole dipole, Acetone can not participate in hydrogen bonding
500
Arrange the following molecules in terms of weakest to strongest: CH3NOH, CH3OOH, CH3I
CH3I < CH3NOH < CH3OOH
500
If your lewis structure has lone pairs on the central atom then it is __________ and ___________.
Asymmetrical; polar