CHEM 1031 Intermolecular Forces

Identify the main type of attractive force that is present in the compound: SiO2

• Ionic Bonds
• Dipole-Dipole
• Hydrogen Bonding
• London Dispersion

Answer explanation

EN between Si and O is polar!

It's a dipole-dipole interaction.

(Something to keep in mind: even though the bonds are polar, the molecule is nonpolar! The polar forces are cancelling each other out!)

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-3

NGSS.HS-PS1-2

Identify the main type of attractive force that is present in the compound: NF3

• Hydrogen Bonding
• London Dispersion
• Dipole-Dipole
• Ionic Bond

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Identify the main type of attractive force that is present in the compound: NaCl

• Ionic Bonding
• Dipole-Dipole
• London Dispersion
• Hydrogen Bonding

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-3

NGSS.HS-PS1-2

Identify if the MOLECULE is polar or nonpolar CBr4

• Ionic Bonding
• London Dispersion
• Dipole-Dipole
• Hydrogen Bonding

Answer explanation

C-Br is inherently polar, but remember that the molecule is tetrahedral.

The 4 Br are trying to pull apart in 4 equally distant corners. This means: there's an equal force in all directions, creating no net change in the charge of the molecule.

Tags

NGSS.HS-PS1-1

Which of the two compounds has the highest boiling point? N2 or NH3

• N2
• NH3

Answer explanation

It's harder to break apart bonds when they're polar, so they have a higher boiling point!

Tags

NGSS.HS-PS1-3

Which of the two compounds has the highest boiling point?

• CS2

• SO2

Answer explanation

SO2 has dipole-dipole interactions, but CS2 only has london dispersion

It's harder to break apart bonds when they're polar, so they have a higher boiling point!

Tags

NGSS.HS-PS1-1

Which of the two compounds has the highest boiling point? NaCl or Cl2

• NaCl

• Cl2

Answer explanation

In terms of boiling point

Ionic > H-bonding > Dipole-dipole > London Dispersion

Identify the main type of attractive force that is present in the compound: BeCl2

• London Dispersion

• Hydrogen Bonding

• Dipole-Dipole

• Iconic Bond

Tags

NGSS.HS-PS1-3

Which of the following molecules is most likely to form hydrogen bonds?

• H2S

• HF

• C2H6

• HCl

Answer explanation

Chemistry is F.O.N. :)

(Fluorine) (Oxygen) (Nitrogen)

Would you expect CS2 to dissolve in water?

• Yes

• No