PH of a weak diprotic acid?

Question

How do you calculate the pH of a weak diprotic acid as it is being titrated with NaOH?

Also how do you calculate the pH of a weak diprotic base as it is being titrated with HCl?

Answer 1

hmm i am not sure you can calculate it like in the way i think you mean it. We always use pH-meter or visual (indicator) or way easier a titroprocessor (does it all for you) but anyway....I would use an pH meter and get a good equivalence point and calculate with excel. Put pH u measured against volume in ml you titrated in little steps before the equivalence point and just after. I hope u understand what im saying