The Lewis structure for HCOOH shows oxygen atom surrounded by four regions of electron density. Thus, we predict the distribution of electron pairs about oxygen as tetrahedral and the bond angle about oxygen is 109.5°. We can represent the bond angles as follows:
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In this case, the molecule is formic acid (HCOOH) which has a trigonal planar geometry around the carbon atom and a bent geometry around the oxygen atom due to resonance. Show more…
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