resonance

Question

The number of resonance structures for the carbonate ion (CO₃²⁻) is:

RankGuru · Accepted Answer

The **Carbonate Ion ($CO_3^{2-}$)** exhibits resonance because the $\pi$ electrons of the $C=O$ double bond can be delocalized over the three oxygen atoms.
- In each canonical structure, one oxygen is double-bonded to carbon (formal charge 0) and the other two are single-bonded (formal charge $-1$ each).
- There are **3 equivalent resonance structures**.
- The actual structure (resonance hybrid) shows that all three $C-O$ bonds are of equal length, intermediate between a single and a double bond.

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resonance

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More resonance Practice Questions

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