HNO2 Structure and Properties

The video tutorial explains the process of drawing the Lewis structure for HNO2, also known as nitrous acid. It begins by identifying the components of the molecule and their arrangement, with hydrogen placed on the outside of one of the oxygens. The tutorial then counts the total valence electrons and demonstrates how to form chemical bonds between the atoms, ensuring that each atom achieves a full outer shell. The video also covers the concept of formal charges, showing that each atom in the HNO2 structure has a formal charge of zero. The tutorial concludes with a summary of the completed Lewis structure.

What is the significance of having an H in front of a polyatomic ion like NO2?

• It indicates the compound is a base.

• It means the compound is neutral.

• It shows the compound is an acid.

• It suggests the compound is a salt.

How many total valence electrons are present in HNO2?

• 20

• 22

• 16

• 18

Where is the hydrogen atom placed in the HNO2 Lewis structure?

• In the center of the structure

• On the outside of one of the oxygens

• Attached to the nitrogen atom

• Between the two oxygen atoms

What adjustment is made to ensure nitrogen has a full outer shell in HNO2?

• Forming a double bond with oxygen

• Adding more valence electrons

• Adding more hydrogen atoms

• Removing an oxygen atom

What is the formal charge on each atom in the HNO2 Lewis structure?

• +2

• 0

• -1

• +1

What is the final step in confirming the HNO2 Lewis structure?

• Ensuring all atoms have full outer shells

• Counting the total number of atoms

• Checking the molecular weight

• Balancing the chemical equation