\( CH _ { 3 } COOH + H _ { 2 } O \rightarrow \)

When acetic acid (\( CH_3COOH \)) reacts with water (\( H_2O \)), it partially ionizes to form acetate ions (\( CH_3COO^- \)) and hydronium ions (\( H_3O^+ \)). This reaction demonstrates the acid-base behavior, where acetic acid acts as a weak acid, donating a proton to water, which serves as a base in this context. This reversible reaction is key to understanding equilibrium in weak acid solutions! In practical applications, this reaction is vital in various fields, from food science to biology. For instance, in the kitchen, acetic acid is found in vinegar, adding tang to dishes while also preserving food due to its acidity. In the human body, the buffering action of weak acids like acetic acid helps maintain pH balance, which is crucial for proper cellular function and metabolism!