1. Structure and Formula:
* Oxalic Acid: A dicarboxylic acid with the formula HOOC-COOH. It has two carboxyl groups directly connected.
* Ethanoic Acid (Acetic Acid): A monocarboxylic acid with the formula CH3COOH. It has one carboxyl group attached to a methyl group.
2. Molecular Weight:
* Oxalic Acid: 90.03 g/mol
* Ethanoic Acid: 60.05 g/mol
3. Physical Properties:
* Oxalic Acid: White, crystalline solid. Sublimes upon heating. Highly soluble in water.
* Ethanoic Acid: Colorless liquid at room temperature. Sharp, pungent odor. Miscible with water.
4. Acidity:
* Oxalic Acid: Stronger acid than ethanoic acid (pKa1 = 1.27, pKa2 = 4.27). This is because the two carboxyl groups in oxalic acid can stabilize the conjugate base through resonance.
* Ethanoic Acid: Weaker acid (pKa = 4.76).
5. Reactions:
* Oxalic Acid: A powerful reducing agent and is used in bleaching and cleaning. Reacts with metals to form oxalates.
* Ethanoic Acid: Used as a solvent, reagent in organic chemistry, and a component of vinegar.
6. Toxicity:
* Oxalic Acid: Toxic in large amounts. Can cause kidney damage and gastrointestinal issues.
* Ethanoic Acid: Mildly corrosive and irritant, but generally considered safe in small amounts.
7. Uses:
* Oxalic Acid: Cleaning, bleaching, rust removal, and as a mordant in dyeing.
* Ethanoic Acid: Food preservation, vinegar production, organic synthesis, and as a solvent.
In summary:
Oxalic acid is a strong dicarboxylic acid with a toxic nature, while ethanoic acid is a weaker monocarboxylic acid found in vinegar. They differ significantly in their structural properties, acidity, reactivity, and uses.
