Ethanol Molecular Structure and Geometry

The video tutorial explores the molecular geometry of ethanol (C2H5OH), also known as ethyl alcohol. It begins by examining the geometry of carbon atoms, which are tetrahedral with a bond angle of 109.5 degrees due to four bonded atoms and no lone pairs. The oxygen atom, however, has a bent geometry because of its two lone pairs, affecting the bond angle slightly. The tutorial also explains the use of AXE notation to determine molecular geometry, with carbon atoms represented as AX4 and the oxygen atom as AX2E2. Finally, the video visualizes the 3D structure of ethanol, highlighting the spatial arrangement of atoms and lone pairs.

What is the molecular formula of ethanol?

• C2H5OH

• C2H6O2

• CH3OH

• C3H7OH

What is the steric number of the first carbon atom in ethanol?

• 6

• 5

• 4

• 3

What is the molecular geometry of the first carbon atom in ethanol?

• Bent

• Tetrahedral

• Trigonal Planar

• Linear

What is the bond angle associated with a tetrahedral geometry?

• 90 degrees

• 109.5 degrees

• 180 degrees

• 120 degrees

How many things are attached to the second carbon atom in ethanol?

• 2

• 3

• 4

• 5

What is the molecular geometry of the second carbon atom in ethanol?

• Linear

• Trigonal Planar

• Bent

• Tetrahedral

How many lone pairs are present on the oxygen atom in ethanol?

• 3

• 0

• 1

• 2

What is the molecular geometry of the oxygen atom in ethanol?

• Bent

• Linear

• Trigonal Planar

• Tetrahedral

What is the AXE notation for the oxygen atom in ethanol?

• AX3

• AX2E2

• AX2

• AX4

What is the overall shape of ethanol when viewed in three dimensions?

• Linear

• Trigonal Planar

• Tetrahedral

• Bent