Lewis Structures and Molecular Geometry

The video tutorial explains how to draw the Lewis structure for hypofluorous acid (HOF). It begins by placing the least electronegative element, oxygen, in the center, with hydrogen and fluorine on the outside. The tutorial counts the valence electrons for each element, totaling 14, and demonstrates how to distribute them to form chemical bonds and complete octets. The molecular geometry is explored, showing a bent shape due to lone pairs, with a bond angle of 97.2 degrees. The electron geometry is tetrahedral. The video concludes with a review of the structure and its properties in the gas phase.

Which element is placed in the center of the Lewis structure for HOF?

• Fluorine

• Carbon

• Hydrogen

• Oxygen

Which element is always placed on the outside in a Lewis structure?

• Hydrogen

• Oxygen

• Fluorine

• Nitrogen

How many valence electrons does fluorine contribute to the HOF molecule?

• 8

• 7

• 1

• 6

What is the total number of valence electrons used in the Lewis structure of HOF?

• 10

• 12

• 14

• 16

Which atom in HOF has a complete octet in the Lewis structure?

• Fluorine

• None

• Oxygen

• Hydrogen

What is the ideal bond angle in a tetrahedral molecular geometry?

• 120 degrees

• 180 degrees

• 109.5 degrees

• 90 degrees

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

• 1

• 2

• 3

• 4

What is the molecular geometry of HOF due to the presence of lone pairs?

• Tetrahedral

• Bent

• Trigonal planar

• Linear

What is the bond angle between hydrogen and fluorine in the gas phase of HOF?

• 97.2 degrees

• 109.5 degrees

• 120 degrees

• 90 degrees

What is the electron geometry of HOF considering both atoms and lone pairs?

• Linear

• Tetrahedral

• Trigonal planar

• Bent