... titration of a strong acid with a strong base, a chemist used 25.00 mL of 0.1000 M HCl. The molarity of the base was also 0.1000 M, and this solution was added in small portions to the acid. Calculate ... (Ans: 1.3, 2.88, 8.79, 2.27, 4.2) Polyatomic Acids & Bases 13. Phosphorus acid, H3PO4, is actually a diprotic acid; Ka1 = 1.0 X 10-2 and Ka2 = 2.6 X 10-7. What are the values ... family as sulphur, forms an acid analogous to sulphuric acid and called telluric acid. It exists, however, as H6TeO6 (which looks like H2TeO4 + 2 H2O). It is a diprotic acid. Ka1 = 2.1 X 10-8 and...