Molecular Geometry and Intermolecular forces

Hybridization

100

The hybridization of CH₄

sp³

200

If an s orbital and two p orbitals combine, we get an _____ orbital

sp²

300

The hybridization of Xe in the compound XeF₄

sp³d²

400

The hybridization of an atom connected to three other atoms and with two lone pairs

sp³d

500

The hybridization of C bonded to O in acetic acid (HC₂H₃0₂) is...

sp²

Molecular Geometry

100

What is the molecular geometry of water

Bent

200

What is the molecular shape of CH₄ ?

Tetrahedral

300

What is the molecular Geometry of the Carbonate ion?

Trigonal planar

400

The molecular shape of an atom bonded to four atoms with two lone pairs

Square Planar

500

The molecular shape of ClF₃

T-shaped

VSEPR Theory and Bond Angles

100

The acronym VSEPR stands for...

Valence-Shell Electron-Pair Repulsion

200

What is the bond angle in:

a) a tetrahedral

b) a trigonal planar

c) a linear molecule?

a) 109.5°

b) 120°

c) 180°

300

The molecule with the greatest dipole moment of the following: CO, HBr, HCl, HI, O₂

HCl

400

Predict the Electron-Pair Geometry of the following molecules and ions using the VSEPR model:

a) SO₄^2-

b) CBr₄

a) Tetrahedral

b) Tetrahedral

500

Predict the EPG for the following ions using the VSEPR model:

a) NH₂^-

b) NO₂^-

a) Tetrahedral (not to be confused with MG which is bent)

b) Trigonal planar (not to be confused with MG which is bent)

Polarity

100

What are the five intermolecular forces?

London dispersion forces

Dipole-induced dipole interactions

Dipole-dipole interactions

Ion-dipole interaction

Hydrogen bonding

200

Is C₂H₂ polar or nonpolar?

non-polar

300

Is NH₃ polar or non-polar?

polar

400

Determine whether (a) NBr₃, (b) ClF₃, and (c) H₂O are polar.

They are all polar

500

XeF₄ is polar or nonpolar?

non-polar

Intermolecular Forces

100

Which elements must be present for hydrogen bonding to occur?

Mnemonic: FON

Fluorine

Oxygen

Nitrogen

200

List the types of intermolecular forces that exist between molecules (or atoms or ions) in each of the following species or mixtures:

a) Benzene (C₆H₆) 

b) NaCl in water

c) benzene and water

a) London dispersion forces

b) London dispersion, ion-dipole interaction, dipole-dipole interaction, hydrogen bonding

c) London dispersion, dipole-induced dipole, dipole-dipole, and hydrogen bonding

300

These types of intermolecular forces are present in:

a) CH₃CH₂OCH₃

b) CH₃CH₂CH₂CH₂CH₂CH₂CH₂CH₂CH₂CH₂CH₂Cl

a) Dipole/Dipole and London dispersion forces

b) London dispersion, Dipole-induced dipole, Dipole-dipole forces

400

Which ONE of the following species is capable of hydrogen bonding?

A) C₂H₆

B) HI

C) CH₃NH₂

D) CH₃COCH₃

C only

500

The molecule with the lowest melting point out of the following: CH₄, AgCl, CH₃CH₂OH.

CH₄