Molecular Geometry Review

VSEPR stands for:

• Valence Shell Electron Pair Repulsion

• Valence Shell Electron Pair Rotation

• Valence Shell Energy Pair Repulsion

• Valence Shell Electron Proton Repulsion

What are the advantages and disadvantages of Lewis Structures when considering molecular geometry?

• They provide a clear representation of bonding but do not accurately depict molecular geometry.

• They accurately depict molecular geometry but do not provide a clear representation of bonding.

• They provide both a clear representation of bonding and accurately depict molecular geometry.

• They neither provide a clear representation of bonding nor accurately depict molecular geometry.

What is the molecular shape of a compound that has 3 electron domains, all of which are bonding domains?

• Linear

• Trigonal Planar

• Tetrahedral

• Bent

What is the molecular shape of a compound that has 4 electron domains, 3 of which are bonding domains and 1 of which is a lone pair?

• Tetrahedral

• Trigonal Pyramidal

• Bent

• Linear

Consider the two compounds, CS₂ and H₂O. What is the difference between the two molecular shapes, with consideration to bond angles as well?

• CS₂ is linear with a bond angle of 180°, while H₂O is bent with a bond angle of approximately 104.5°.

• CS₂ is bent with a bond angle of approximately 104.5°, while H₂O is linear with a bond angle of 180°.

• Both CS₂ and H₂O are linear with bond angles of 180°.

• Both CS₂ and H₂O are bent with bond angles of approximately 104.5°.

HBr: # Electron Domains: _____ # Lone Pairs: _____ Molecule Shape: __________________________

• Electron Domains: 1, Lone Pairs: 3, Molecule Shape: Linear

• Electron Domains: 2, Lone Pairs: 0, Molecule Shape: Bent

• Electron Domains: 1, Lone Pairs: 0, Molecule Shape: Linear

• Electron Domains: 3, Lone Pairs: 1, Molecule Shape: Trigonal Planar

H₂S: # Electron Domains: _____ # Lone Pairs: _____ Molecule Shape: __________________________

• Electron Domains: 4, Lone Pairs: 2, Molecule Shape: Bent

• Electron Domains: 3, Lone Pairs: 1, Molecule Shape: Trigonal Planar

• Electron Domains: 2, Lone Pairs: 0, Molecule Shape: Linear

• Electron Domains: 4, Lone Pairs: 0, Molecule Shape: Tetrahedral

For the compound PCl3, draw the Lewis Structure and fill in the blanks: # Electron Domains: _____ # Lone Pairs: _____ Molecule Shape: ____________________________

• # Electron Domains: 4 # Lone Pairs: 1 Molecule Shape: Trigonal Pyramidal

• # Electron Domains: 3 # Lone Pairs: 0 Molecule Shape: Trigonal Planar

• # Electron Domains: 5 # Lone Pairs: 2 Molecule Shape: T-shaped

• # Electron Domains: 4 # Lone Pairs: 2 Molecule Shape: Bent

For the compound CH4, draw the Lewis Structure and fill in the blanks: # Electron Domains: _____ # Lone Pairs: _____ Molecule Shape: ____________________________

• Electron Domains: 4, Lone Pairs: 0, Molecule Shape: Tetrahedral

• Electron Domains: 3, Lone Pairs: 1, Molecule Shape: Trigonal Pyramidal

• Electron Domains: 2, Lone Pairs: 2, Molecule Shape: Bent

• Electron Domains: 4, Lone Pairs: 1, Molecule Shape: Seesaw

For the compound CH2O, draw the Lewis Structure and fill in the blanks: # Electron Domains: _____ # Lone Pairs: _____ Molecule Shape: ____________________________

• Electron Domains: 3, Lone Pairs: 1, Molecule Shape: Trigonal Planar

• Electron Domains: 4, Lone Pairs: 0, Molecule Shape: Tetrahedral

• Electron Domains: 2, Lone Pairs: 0, Molecule Shape: Linear

• Electron Domains: 3, Lone Pairs: 0, Molecule Shape: Trigonal Planar