Question

Phosphorus acid, H3PO3(aq), is a diprotic oxyacid that is an important compound in industry and agriculture. Calculate the pH for each of the following points in the titration of 50.0 mL of a 1.8M H3PO3(aq) with 1.8M KOH(aq). pKa1 = 1.30; pKa2 = 6.70.

a) 0 mL; pH =

b) 25 mL; pH =

c) 50 mL; pH =

d) 75 mL; pH =

e) 100 mL; pH =

Answer 1