Molecular Geometry and AXE Notation

The video tutorial explains how to determine the molecular geometry of H2CO3, also known as formaldehyde. It begins with an analysis of the Lewis structure, highlighting the steric number and the absence of lone pairs on the central carbon atom, leading to a trigonal planar geometry with 120-degree bond angles. The tutorial then visualizes the structure, confirming the trigonal planar shape. It introduces the AXE notation method to further verify the molecular geometry, concluding with a summary of the findings.

What is the first step in determining the molecular geometry of H2CO3?

• Looking at the Lewis structure

• Measuring bond angles

• Using the AXE notation

• Visualizing the structure

How many things are attached to the central carbon in H2CO3?

• Five

• Two

• Three

• Four

What is the molecular geometry of H2CO3?

• Linear

• Trigonal planar

• Tetrahedral

• Bent

What is the bond angle in a trigonal planar geometry?

• 90 degrees

• 109.5 degrees

• 120 degrees

• 180 degrees

What color represents the carbon atom in the visualization model?

• Green

• Blue

• Purple

• Red

Why is the electron geometry of H2CO3 the same as its molecular geometry?

• Because there are no lone pairs on the carbon

• Due to the presence of double bonds

• Because of lone pairs

• Because of the steric number

What does the 'A' in AXE notation stand for?

• Bond angle

• Number of atoms attached

• Central atom

• Number of lone pairs

In AXE notation, what does 'X' represent?

• Number of lone pairs

• Bond angle

• Central atom

• Number of atoms attached

What is the AXE notation for H2CO3?

• AX3E1

• AX2E0

• AX3E0

• AX2E1

What is the bond angle associated with the AX3E0 notation?

• 180 degrees

• 109.5 degrees

• 120 degrees

• 90 degrees