HW 2-3: Question 3

[Shaniya Kerns 4D]

Muscles produce lactic acid, CH3CH(OH)COOH(aq), during exercise. Calculate the percent ionization (deprotonation), pH, and pOH of a 0.1025 M solution of lactic acid. The acid-dissociation (or ionization) constant, Ka, of this acid is 8.40 x 10^-4.
How do you find the Percent ionization of the solution and calculate the pH?

[905960080]

To calculate pH, you use the concentration for the acid to find the concentrations of H+ and the conjugate base. pH would be 10^-[H+]. Once you have that pH and that concentration you can use the percent ionization = [H+] / [Lactic Acic] x 100. (using the given initial concentration of lactic acid