CHM 1311: Hybridization and Geometries Practice Questions

Acetylene (C2H2)

• The correct Lewis structure of acetylene features a triple bond between the two carbon atoms.
• The hybridization of each carbon atom is sp.
• The geometry of each carbon atom is linear.
• The molecule has 1 sigma and 2 pi bonds between the carbon atoms.
• Additionally, there are 2 C-H sigma bonds.

1-Butene (CH3CH=CH2)

• The correct Lewis structure of 1-butene features a double bond between the middle carbon atoms.
• The hybridization of the first carbon atom is sp3.
• The hybridization of the middle carbon atoms is sp2.
• The geometry of the first carbon atom is tetrahedral.
• The geometry of the middle carbon atoms is trigonal planar.
• The molecule has 1 sigma bond between the carbon atoms.
• The molecule has 1 sigma and 1 pi bond between the middle carbon atoms.
• Additionally, there are 6 C-H sigma bonds.

Antimony Pentafluoride (SbF5)

• The correct Lewis structure of antimony pentafluoride features a central antimony atom surrounded by five fluorine atoms.
• The hybridization of the antimony atom is dsp3.
• The geometry of the antimony atom is trigonal bipyramid.
• The molecule has 5 Sb-F sigma bonds.

Ammonia (NH3)

• The correct Lewis structure of ammonia features a nitrogen atom bonded to three hydrogen atoms.
• The hybridization of the nitrogen atom is sp3.
• The geometry of the nitrogen atom is trigonal pyramidal.
• The molecule has 3 N-H sigma bonds.

Formaldehyde (CH2=O)

• The correct Lewis structure of formaldehyde features a double bond between the carbon and oxygen atoms.
• The hybridization of the carbon atom is sp2.
• The geometry of the carbon atom is trigonal planar.
• The molecule has 1 sigma and 1 pi bond between the carbon and oxygen atoms.
• Additionally, there are 2 C-H sigma bonds.

Sulfur Hexafluoride (SF6)

• The correct Lewis structure of sulfur hexafluoride features a central sulfur atom surrounded by six fluorine atoms.
• The hybridization of the sulfur atom is d2sp3.
• The geometry of the sulfur atom is octahedral.
• The molecule has 6 S-F sigma bonds.