Molecular Geometry of Water

The video tutorial explains how to determine the molecular geometry of water (H2O) using the Lewis structure and valence shell electron pair repulsion theory. It shows that H2O has a bent shape due to the two hydrogen atoms and two lone pairs of electrons on the oxygen atom. The tutorial also introduces the AXN notation method to confirm the bent geometry and bond angles of 109.5°. The video concludes by summarizing the methods used to determine the molecular geometry of water.

What is the first step in determining the molecular geometry of H2O?

• Using a 3D model

• Consulting a table

• Examining the Lewis structure

• Applying the AXN notation

According to the valence shell electron pair repulsion theory, how do electron pairs arrange themselves?

• As far apart as possible

• In a circular pattern

• In a linear fashion

• As close as possible

What shape does the water molecule have when visualized in three dimensions?

• Linear

• Bent

• Trigonal planar

• Tetrahedral

In the AXN notation, what does 'A' represent?

• The central atom

• The bond angle

• The number of attached atoms

• The number of lone pairs

How many non-bonding electron pairs are present in the water molecule according to the AXN notation?

• Four

• Three

• Two

• One

What is the molecular geometry of H2O as determined by the AXN notation?

• Trigonal planar

• Tetrahedral

• Linear

• Bent

What bond angle is associated with the bent molecular geometry of water?

• 90°

• 120°

• 109.5°

• 180°

Which method confirms the bent shape of the water molecule?

• Using a 3D model

• Consulting a table

• Applying the Lewis structure

• Using the AXN notation

What is the significance of the bond angle in the water molecule?

• It affects the molecule's polarity

• It determines the color of the molecule

• It defines the molecule's mass

• It changes the molecule's state

Which two methods were used to determine the molecular geometry of water?

• Table consultation and mass calculation

• Electron pair repulsion theory and state change

• Lewis structure and AXN notation

• 3D modeling and color analysis