Acetic Acid and Sodium Acetate Buffer System
CH3COOH ⇌ CH3COO− + H+
Overview
The acetic acid/sodium acetate buffer system resists pH changes by shifting equilibrium in response to added acid or base. When acid is added, acetate ions consume H⁺; when base is added, acetic acid donates H⁺. This buffer is most effective near pH 4.75 (the pKa of acetic acid). The Henderson-Hasselbalch equation governs the buffer pH.
Participants
| Role | Substance | Coefficient | State |
|---|---|---|---|
| Reactant | Acetic Acid CH₃COOH | 1 | (aq) |
Everyday Example
Vinegar-based salad dressings maintain their characteristic sour taste because the acetic acid/acetate system buffers the pH around 4.75.
Industrial Importance
Acetate buffers are widely used in biochemistry laboratories, in textile dyeing processes, and in food processing to maintain consistent pH.
Properties
- Type
- Acid-Base
- Reversible
- Yes
- Energy
- Endothermic
Related Reactions
Acetic Acid and Sodium Hydroxide Neutralization
Acetic Acid Dissociation in Water
Aluminum Chloride and Chloride Ion (Lewis Acid-Base)
Aluminum Hydroxide as Amphoteric Acid with NaOH
Aluminum Hydroxide as Amphoteric Base with HCl
Ammonia and Ammonium Chloride Buffer System
Ammonia and Hydrochloric Acid
Ascorbic Acid and Sodium Hydroxide
Barium Hydroxide and Ammonium Thiocyanate (Endothermic)
Benzoic Acid and Sodium Hydroxide
Frequently Asked Questions
What is the equation for Acetic Acid and Sodium Acetate Buffer System?
The balanced equation is: CH₃COOH ⇌ CH₃COO⁻ + H⁺.
What type of reaction is Acetic Acid and Sodium Acetate Buffer System?
Acetic Acid and Sodium Acetate Buffer System is a acid-base reaction. It is reversible under certain conditions.
Is Acetic Acid and Sodium Acetate Buffer System exothermic or endothermic?
Acetic Acid and Sodium Acetate Buffer System is endothermic (absorbs energy).