NO2- Ion Geometry and Properties

The video tutorial explains the molecular geometry of the nitrite ion (NO2-). It begins by identifying the groups attached to the central nitrogen atom, including two oxygen atoms and a lone pair of electrons. This configuration results in a bent molecular geometry with an approximate bond angle of 120 degrees. The tutorial uses visual aids to demonstrate how the lone pair affects the geometry, pushing the oxygen atoms to create the bent shape. The video concludes with a note that the actual bond angle may vary slightly from the general 120-degree estimate.

What is the central atom in the NO2- ion?

• Oxygen

• Nitrogen

• Hydrogen

• Carbon

How many groups are attached to the central nitrogen in NO2-?

• Four

• Three

• Five

• Two

What is the steric number for the central nitrogen in NO2-?

• 5

• 4

• 3

• 2

What is the molecular geometry of NO2-?

• Trigonal Planar

• Bent

• Tetrahedral

• Linear

What is the approximate bond angle in the bent geometry of NO2-?

• 180 degrees

• 120 degrees

• 90 degrees

• 109.5 degrees

What effect does the lone pair have on the bond angle in NO2-?

• Increases the bond angle

• Decreases the bond angle

• Has no effect

• Makes the bond angle exactly 180 degrees

What color represents the central nitrogen in the visualization?

• Blue

• Red

• Purple

• Green

Why might the actual bond angle differ from 120 degrees?

• Because of the presence of hydrogen

• Because 120 degrees is a general approximation

• Due to measurement errors

• Due to the absence of lone pairs

Who is the presenter of the video?

• Dr. A

• Dr. B

• Dr. C

• Dr. D