Biomedical Engineering: Bridging Medicine and Technology 1st Edition by Veronique Tran,Mark Saltzman

Exercise 32

Acetic acid, CH3COOH, is a typical weak acid. It is an ingredient in vinegar.
a. Acetic acid partially ionizes in water. Write a balanced chemical reaction for the dissociation of acetic acid into its conjugate base and hydrogen ion.
b. Write an expression for the equilibrium constant for acetic acid.
c. The equilibrium concentrations are [CH3COOH] = 0.15M, [CH3COOH] = 0.15M, and [CH3COO-] = 1.63mM. What is the equi- librium constant of ionization, KA?
d. Calculate the pKA of acetic acid.