lecture 7 - vsepr

Question 1

Define VSEPR Theory.

Answer 1

Predicts the 3D arrangement of molecules by minimizing electron pair repulsion.

Question 2

What is an electron domain?

Answer 2

A region where electrons are most likely to be found, including lone pairs and bonds.

Question 3

What is the shape of CH₄?

Answer 3

Tetrahedral.

Question 4

Describe the shape of NH₃.

Answer 4

Trigonal pyramidal due to one lone pair.

Question 5

What is the geometry of H₂O?

Answer 5

Bent (or V-shaped) due to two lone pairs.

Question 6

Rank the repulsion strength of electron pairs.

Answer 6

Lone pair-lone pair > lone pair-bonding pair > bonding pair-bonding pair.

Question 7

How does hybridization relate to geometry?

Answer 7

sp (linear), sp² (trigonal planar), sp³ (tetrahedral), sp³d (trigonal bipyramidal), sp³d² (octahedral).

Question 8

What is the shape of CO₂?

Answer 8

Linear

Question 9

Predict the geometry of SF₆.

Answer 9

Octahedral.

Question 10

What determines the shape of a molecule?

Answer 10

Number of lone pairs and atoms bonded to the central atom.