Acetic acid can be deprotonated to form acetate ion, CH3CO–2 . Draw two other resonance structures. Identify the major (most important) and minor (less important) structures.

Acetate ion consists of a central carbon that is double bonded to an oxygen with two lone pairs. It is single bonded to a negatively charged oxygen with three lone pairs. The central carbon is also bonded to a C H 3 group.Step 1: Define resonance structures.

Step 2: Determine when resonance structures can or cannot form.

Step 3: Draw curved arrows to form resonance structures.

Step 4: Determine whether the resonance structures are major (more important) or minor (less important).

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Draw a curved arrow starting from an alkoxide lone pair of resonance structure B, which will form resonance structure C.

Draw all atoms of the resulting resonance structure C. Show charges and lone pairs