What is the hybrid state and spatial shape of the Carbonate ion (CO3 2-)?
Answer and explanation
Correct answer: A. sp^2 hybridization, trigonal planar geometry
- Step 1: The central carbon in CO3 2- forms three sigma bonds with oxygen atoms and has zero lone pairs (steric number 3). Step 2. Mixing one 2s and two 2p orbitals gives sp^2 hybridization with a symmetrical trigonal planar shape (120 degree bond angles). Answer: sp^2 hybridization, trigonal planar geometry. Why not the others: sp^3 is tetrahedral (CH4, SO4 2-); sp is linear (CO2); sp^3d is trigonal bipyramidal.
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