Shaping Molecules: Geometry of AB₄, AB₅, and AB₆ Explained

The video tutorial explains the VSEPR theory and its application in determining the molecular geometry of different molecules. It covers the structure of methane, phosphorus pentachloride, and sulfur hexafluoride, highlighting their bond angles and molecular shapes. Methane is described as a tetrahedral molecule with bond angles of 109.5°, phosphorus pentachloride as a trigonal bipyramidal molecule with varying bond angles, and sulfur hexafluoride as an octahedral molecule with 90° bond angles.

What is the bond angle in a methane molecule?

• 180°

• 109.5°

• 90°

• 120°

In a trigonal bipyramidal shape, what is the bond angle between equatorial bonds?

• 90°

• 109.5°

• 120°

• 180°

How many different types of positions are there in a PCl5 molecule?

• Two

• One

• Three

• Four

What is the shape of the SF6 molecule?

• Trigonal bipyramidal

• Square planar

• Octahedral

• Tetrahedral

In an octahedral arrangement, what is the bond angle between adjacent bonds?

• 180°

• 90°

• 109.5°

• 120°