Lewis Structure Generator
Pyruvic Acid · C₃H₄O₃

C₃H₄O₃ Lewis Structure

Pyruvic acid combines a ketone carbonyl with a carboxylic-acid group.

Open C₃H₄O₃ in the generatorSee drawing steps
C₃H₄O₃
CH₃—C(=O)—C(=O)—O—H
Reviewed stored connectivity; detailed electron placement is explained below
Total valence electrons34
Reviewed connectivityCH₃—C(=O)—C(=O)—O—H
GeometryPlanar at both carbonyl carbons
Support levelReviewed guide

Pyruvic Acid overview

The stored Lewis connectivity is CH₃—C(=O)—C(=O)—O—H. Pyruvic acid combines a ketone carbonyl with a carboxylic-acid group.

How to draw C₃H₄O₃

  1. Count 34 valence electrons. Include charge adjustments before drawing.
  2. Use the reviewed connectivity CH₃—C(=O)—C(=O)—O—H. Do not infer a different isomer from the formula alone.
  3. Place the required single, double or multiple bonds. Keep a running electron total.
  4. Complete terminal valence shells and add lone pairs or formal charges. Pyruvic acid combines a ketone carbonyl with a carboxylic-acid group.
  5. Verify the total electron count and geometry. The reviewed geometry is Planar at both carbonyl carbons.

Why this example matters

Pyruvic acid combines a ketone carbonyl with a carboxylic-acid group.

Scope and model limits

The neutral keto form is displayed; solution equilibria and deprotonated pyruvate require additional contributors and charge accounting.

Common mistakes

  • Using 24 instead of 34 valence electrons
  • Drawing only one carbonyl
  • Attaching the acid hydrogen to carbon

Last reviewed: 2026-07-16. Educational reference only; verify graded work with course materials.