Calculate the pH of a 0.3 M solution of a weak acid, AH, for instance CH3COOH, and 0.15 M of a salt derived by its conjugate base, ANa, like CH3COONa. The acid dissociation constant, Ka , is 1.76e-7. What is the pH if 32 mL of 0.103 M of a strong acid, like HCl, is added to 100 mL of the buffer solution? What if a strong base, like NaOH, is added with the same ammount instead ? answers