Sulfite Ion Structure and Properties

This video tutorial explores the molecular geometry of the sulfite ion (SO3 2-). It begins by explaining the concept of steric number, which is the number of atoms and lone pairs around a central atom. The video then describes how the presence of a lone pair affects the molecular shape, resulting in a trigonal pyramidal geometry with a bond angle slightly less than the typical 109.5 degrees, due to the repulsion caused by the lone pair. The tutorial also covers the structure and bonding of SO3, highlighting the impact of lone pairs on bond angles. The video concludes with a brief mention of additional resources for drawing Lewis structures.

What is the central atom in the sulfite ion?

• Nitrogen

• Hydrogen

• Sulfur

• Oxygen

How many oxygens are bonded to the central sulfur atom in the sulfite ion?

• Four

• One

• Three

• Two

What is the steric number of the sulfite ion?

• Six

• Five

• Four

• Three

What is the molecular shape of the sulfite ion with one lone pair?

• Tetrahedral

• Trigonal pyramidal

• Linear

• Trigonal planar

What is the approximate bond angle in the sulfite ion due to the lone pair?

• 90 degrees

• 106 degrees

• 120 degrees

• 109.5 degrees

How does the lone pair affect the bond angles in the sulfite ion?

• It decreases the bond angles

• It has no effect

• It makes the bond angles equal

• It increases the bond angles

What type of bonds are present in the sulfite ion structure?

• Single and double bonds

• Only double bonds

• Only single bonds

• Triple bonds

What would be the molecular geometry of the sulfite ion without the lone pair?

• Tetrahedral

• Trigonal pyramidal

• Linear

• Trigonal planar

What is the role of the lone pair in the molecular geometry of the sulfite ion?

• It forms additional bonds

• It has no role

• It occupies more space and alters bond angles

• It stabilizes the ion

Where can you find additional help for drawing the Lewis structure of the sulfite ion?

• In the video description

• In the textbook

• In the lecture notes

• In the appendix