Use the Henderson-Hasslebalch equation:
pH = pKa + log (base/acid).
You will need pKa. That is -log Ka.
You know pH and you can calculate pKa. Solve for (acid/base) and that is the ratio you want.
Aspirin (acetylsalicylic acid) can cause stomach bleeding. Only the acid form can cross the stomach lining. Determine the ratio of base to its conjugate acid when the stomach pH=2.00. Ka aspirin = 2.75x10-5
1 answer
1 answer