AP Bonding & VSEPR Review Unit 2

The VSEPR theory basically states that the shape of a molecule is based on the...

• nuclear attractions

• nuclear repulsions

• electrostatic attractions

• electron repulsions

Answer explanation

Remember that VSEPR stands for

Valence

Shell

Electron

Pair

Repulsion

So the bonds/lone pairs will maximize the distance between them in a molecule.

Match the following hybridizations to the correct geometry

• trigonal planar

• sp²

• trigonal pyramidal

• sp

• linear

• sp³

What type of molecular geometry is seen in the picture?

• trigonal planar

• octahedral

• tetrahedral

• trigonal bipuramidal

Answer explanation

That molecule has one central atom and four atoms attached. So that gives it a generic formula of AX₄ which is the tetrahedral geometry.

Complete the lewis structure for the C₂H₃O₂^-1 ion and make sure to show all lone pairs

The Lewis Dot diagram for triiodide I₃^- is shown on the left. What shape is the molecular geometry?

• bent

• linear

• tetrhedral

• trigonal planar

Answer explanation

Here we have a molecule with one central atom with three lone pairs and two atoms attached to it. That gives us the generic formula of AX₂E₃ which is one of two linear forms.

The Lewis Dot diagram for hydronium H₃O⁺ is shown on the left. What shape is the molecular geometry?

• bent

• linear

• tetrhedral

• trigonal pyramidal

Answer explanation

Here we have a molecule with one central atom with one lone pairs and three atoms attached to it. That gives us the generic formula of AX₃E which is trigonal pydramidal.

Match the following hybridizations to the correct geometry

• tetrahedral

• sp³

• trigonal planar

• sp²

• linear

• sp

The Lewis Dot diagram for BF₃ is shown on the left. What shape is the molecular geometry?

• bent

• linear

• tetrhedral

• trigonal planar

Answer explanation

Here we have a molecule with one central atom with three atoms attached to it. That gives us the generic formula of AX₃ which is trigonal planar.

Match the following hybridizations to the correct geometry

• linear

• sp

• bent

• sp²

• trigonal planar

• sp³

What is the shape of the molecule on the left?

• trigonal planar

• tetrhedral

• octahedral

• trigonal bipyramidal

Answer explanation

Here we have one central atom in the molecule and six attached. That gives a generic of AX₆ which means it's an octahedral geometry.