Problem: Write resonance forms that describe the distribution of electrons in each of these molecules or ions. carbonate ion, CO32−

FREE Expert Solution

We are being asked to identify the resonance forms that describe the distribution of electrons in carbonate ion, CO32− ion.

We will have to draw the Lewis Structure of CO32− first.

Step 1: Determine the central atom in this molecule.

• C is less electronegative than O.
• C is the 
central atom and is bonded to the 3 other O atom


Step 2: Calculate the total number of valence electrons present.          

CO32−:

          Group              Valence Electrons

C         4A                    4 valence e x 1
O         6A                    6 valence e- x 3
                                 = 22 valence e

-2 charge                     +2 e­-

 Total = 24 valence e-


Step 3: Draw the Lewis Structure for the molecule

• O and C → prefers to have complete octet (8 e- around them)

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Problem Details

Write resonance forms that describe the distribution of electrons in each of these molecules or ions.

 carbonate ion, CO32−

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Our tutors have indicated that to solve this problem you will need to apply the Resonance Structures concept. You can view video lessons to learn Resonance Structures. Or if you need more Resonance Structures practice, you can also practice Resonance Structures practice problems.