Formal Charge and Lewis Structures

The video tutorial explains how to draw the Lewis structure for HClO3. It begins by identifying HClO3 as an acid and placing the chlorine atom at the center with oxygen atoms around it. The tutorial details the distribution of 26 valence electrons to satisfy the octet rule. It then addresses the calculation of formal charges and the formation of double bonds to minimize these charges, resulting in the best Lewis structure for HClO3. The video concludes with a confirmation of the structure's validity, considering chlorine's ability to hold more than 8 electrons.

What is the central atom in the HClO3 Lewis structure?

• Carbon

• Oxygen

• Hydrogen

• Chlorine

How many valence electrons are there in total for HClO3?

• 24

• 26

• 28

• 30

Where is the hydrogen atom placed in the HClO3 Lewis structure?

• Attached to Chlorine

• Not included

• Attached to one of the Oxygens

• In the center

What is the formal charge on Chlorine before any adjustments?

• -1

• 0

• +2

• +1

What is the formal charge on each of the outer Oxygens before adjustments?

• 0

• -2

• -1

• +1

What adjustment is made to minimize the formal charges in the HClO3 structure?

• Add more electrons

• Remove electrons

• Form a double bond

• Change the central atom

After adjustments, what is the formal charge on all atoms in the HClO3 molecule?

• +2

• -1

• 0

• +1

Why is it acceptable for Chlorine to have more than 8 valence electrons in HClO3?

• It is highly electronegative

• It is a metal

• It is in period 3

• It is in period 2

What is the significance of achieving a formal charge of 0 on all atoms?

• It shows an incomplete octet

• It means the molecule is reactive

• It suggests an incorrect structure

• It indicates a stable structure

What is the final conclusion about the HClO3 Lewis structure?

• It is unstable

• It is the best structure

• It needs more electrons

• It is incorrect