In: Chemistry
1. Vinegar consists of acetic acid, CH3COOH, and water. Write out the equilibrium expression for acetic acid reacting with water.
2. Citric acid, H3C6H5O7, contributes to the acidity of many foods. Write out the equilibrium expression for citric acid reacting with water to lose one acidic proton.
(1) The equilibrium expression when acetic acid reacts with water is
CH3COOH(aq) + H2O(l) CH3COO-(aq) + H3O+(aq)
Since the concentration of solvent (H2O ) does not affect the equilibrium.
(2) The equilibrium expression when Citric acid reacts with water is
C6H8O7(aq) + H2O(l) C6H7O7-(aq) + H3O+(aq)
Since the concentration of solvent (H2O ) does not affect the equilibrium.