Understanding Carbonate Ion Properties

The video tutorial explains the charge on the carbonate ion (CO3) as two minus. It describes two methods to determine this charge: examining compounds like sodium carbonate and calcium carbonate, and calculating the formal charge on each atom in the carbonate ion. The tutorial also discusses resonance forms of the carbonate ion. Dr. B concludes by summarizing the methods to find the carbonate ion charge.

What is the overall charge of the carbonate ion?

• 1+

• 2-

• 0

• 3-

Which element in sodium carbonate contributes a 1+ charge?

• Carbon

• Oxygen

• Sodium

• Calcium

In calcium carbonate, what is the charge of the calcium ion?

• 1+

• 2-

• 1-

• 2+

How does the charge of the carbonate ion balance with calcium in calcium carbonate?

• Calcium is 1- and carbonate is 1+

• Calcium is 1+ and carbonate is 1-

• Calcium is 2+ and carbonate is 2-

• Calcium is 2- and carbonate is 2+

What is the formal charge on the carbon atom in the carbonate ion?

• 1+

• 1-

• 0

• 2-

Which oxygen atoms in the carbonate ion have a formal charge of -1?

• Only the double-bonded oxygen

• All oxygen atoms

• None of the oxygen atoms

• Only the single-bonded oxygens

What is the total formal charge of the carbonate ion?

• 3-

• 0

• 1-

• 2-

What is the effect of resonance on the carbonate ion?

• It changes the overall charge

• It averages the bond lengths

• It removes the charge

• It makes the ion unstable

How does resonance affect the bonds in the carbonate ion?

• It has no effect on bonds

• It averages the bond order

• It makes all bonds double

• It makes all bonds single

What is the overall charge of the carbonate ion considering resonance?

• 3-

• 0

• 2-

• 1+