Acetic Acid Dissociation in Water

概要

Acetic acid partially dissociates in water with Ka = 1.8 × 10⁻⁵, meaning only about 1.3% of molecules ionize in a 1 M solution. This equilibrium is the archetypal weak acid dissociation used to teach acid ionization constants, ICE tables, and the relationship between Ka and pH.

参加者

日常の例

Vinegar (5% acetic acid) has a pH around 2.4 because the weak acid only partially ionizes, unlike strong acids that fully dissociate.

産業上の重要性

弱酸平衡の理解は、緩衝液の調製、医薬品製剤、そして発酵プロセスにおけるpH制御に不可欠です。