Molecular Geometry of SF3-

The video tutorial explains the molecular geometry of the sulfur trifluoride anion (SF3-). It begins with constructing the valid Lewis structure and determining the steric number, which is five, with two lone pairs on the central sulfur atom. This results in a T-shaped molecular geometry. The tutorial then visualizes the 3D structure, showing how the lone pairs push the fluorine atoms to form a T-shape with approximate bond angles of 90 degrees. The AXE notation (AX3E2) is also used to confirm the T-shaped geometry. The video concludes with a summary of the findings.

What is the first step in determining the molecular geometry of SF3-?

• Identifying the bond angles

• Drawing the Lewis structure

• Calculating the molecular mass

• Measuring the bond lengths

How many things are bonded to the central sulfur atom in SF3-?

• Three

• Four

• Five

• Six

What is the steric number for SF3-?

• Five

• Four

• Six

• Three

What shape does the SF3- ion take due to its lone pairs?

• Linear

• Tetrahedral

• T-shaped

• Trigonal planar

How do lone pairs affect the shape of SF3-?

• They make it square planar

• They have no effect

• They push bonded atoms closer

• They make it linear

What is the approximate bond angle in the T-shaped SF3- ion?

• 120 degrees

• 180 degrees

• 90 degrees

• 60 degrees

What does the 'A' represent in AXE notation?

• The molecular shape

• The number of bonded atoms

• The central atom

• The number of lone pairs

In AXE notation, what does 'X' stand for?

• The number of lone pairs

• The central atom

• The number of bonded atoms

• The molecular shape

How many lone pairs are present on the central atom in SF3-?

• Four

• One

• Three

• Two

What is the AXE notation for SF3-?

• AX5E0

• AX2E3

• AX3E2

• AX4E1