Saponification (Fat + NaOH)
fat + 3NaOH → glycerol + 3 sodium carboxylate (soap)
Overview
Saponification is the base-catalyzed hydrolysis of triglyceride fats or oils by sodium hydroxide to produce glycerol and sodium salts of fatty acids (soap). Unlike acid-catalyzed ester hydrolysis, saponification is irreversible because the carboxylate salt is deprotonated. The reaction requires heating and stirring.
Participants
| Role | Substance | Coefficient | State |
|---|---|---|---|
| Reactant | Sodium Hydroxide NaOH | 3 | (aq) |
| Product | Glycerol C₃H₈O₃ | 1 | (l) |
Everyday Example
Handmade soap is produced by heating vegetable oils or animal fats with lye (NaOH) in this ancient saponification reaction.
Industrial Importance
The global soap industry produces over 25 million tonnes annually. Glycerol byproduct is used in pharmaceuticals, cosmetics, and food processing.
Properties
- Type
- Organic
- Reversible
- No
- Energy
- Exothermic
- ΔH
- -25.0 kJ/mol
Related Reactions
Aldol Condensation of Acetaldehyde
Amide Formation (Acetic Acid + Ammonia)
Baeyer-Villiger Oxidation
Beckmann Rearrangement (Cyclohexanone Oxime)
Bromination of Ethylene
Buchwald-Hartwig Amination
Cannizzaro Reaction of Formaldehyde
Catalytic Hydrogenation of Ethylene
Claisen Condensation (Ethyl Acetate)
Condensation Polymerization (Nylon 6,6)
Frequently Asked Questions
What is the equation for Saponification (Fat + NaOH)?
The balanced equation is: fat + 3NaOH → glycerol + 3 sodium carboxylate (soap).
What type of reaction is Saponification (Fat + NaOH)?
Saponification (Fat + NaOH) is a organic reaction.
Is Saponification (Fat + NaOH) exothermic or endothermic?
Saponification (Fat + NaOH) is exothermic (releases energy). The enthalpy change (ΔH) is -25.0 kJ/mol.