Chapter 9, Problem 65E

In the formate ion, HCO₂^-, the carbon atom is the central atom with the other three atoms attached to it. (a) Draw a Lewis structure for the formate ion. (b) What hybridization is exhibited by the C atom? (c) Are there multiple equivalent resonance structures for the ion? (d) Which of the atoms in the ion have $p_{\pi }$ orbitals? (e) How many electrons are in the $\pi$ system of the ion?