Question 5 2 pts What is the pH of a solution containing 0.01 M Na2HPO4 and 0.1 M Na3PO4? The pKa values for phosphoric acid are pk1 = 2.15, pK2 = 6.82, and pK3 = 12.38. 13.38 Question 7 2 pts The dominant anion present in the solution from Question #5 has which of the following properties (select all that apply)? Is an H-bond donor Is an H-bond acceptor Can participate in Van der Waals interactions O A positive charge O A negative charge