Question

carbon oxygen Bond lengths are equal in carbonate ion

Answer 1

Because it performs resonance so because of its resonating property all the bonds have partial double bond character and results into equal bond lengths.

Answer 2

carbonate ion is a symmetric, trigonal planar molecule. All three carbon-oxygen bond distances are about 1.28 Angstroms long. You cannot draw a Lewis structure that would suggest all three bonds are the same length. Instead, you can use resonance structures to understand this fact.


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