Understanding the Lewis Structure of Carbonate Ion

This video tutorial explains how to draw the Lewis structure of the carbonate ion (CO3^2-). It begins with calculating the total valence electrons, followed by constructing the Lewis structure with bonds and lone pairs. The concept of resonance structures is introduced, showing how the double bond can be shared among oxygen atoms. The video also covers the molecular geometry, which is trigonal planar, and the hybridization of the central carbon atom, which is sp2. The tutorial concludes with a brief overview of the bond angles and hybrid orbitals involved.

How many valence electrons are present in the carbonate ion?

• 26

• 20

• 22

• 24

What is the charge of the carbonate ion?

• Neutral

• 2-

• 1-

• 3-

What is the total number of bonds that carbon forms in the carbonate ion?

• 5

• 2

• 4

• 3

Which of the following statements is true about the oxygen atoms in the carbonate ion?

• All oxygen atoms have a double bond.

• One oxygen atom has a double bond, and the others have single bonds.

• All oxygen atoms have single bonds.

• All oxygen atoms have triple bonds.

How many lone pairs does an oxygen atom have when it forms a single bond in the carbonate ion?

• Four

• Three

• Two

• One

What is a resonance structure in the context of the carbonate ion?

• A structure where the double bond can be on any oxygen atom.

• A structure where the double bond is fixed on one oxygen.

• A structure with no double bonds.

• A structure with only single bonds.

What is the molecular geometry of the carbonate ion?

• Bent

• Tetrahedral

• Linear

• Trigonal planar

What is the typical bond angle in a trigonal planar structure like the carbonate ion?

• 180 degrees

• 90 degrees

• 109.5 degrees

• 120 degrees

What is the hybridization of the central carbon atom in the carbonate ion?

• sp

• sp3

• sp2

• sp3d

Which orbitals are involved in the sp2 hybridization of the central carbon atom?

• One s and one p orbital

• One s and two p orbitals

• Two s and one p orbital

• Two s and two p orbitals