Waiting for answer This question has not been answered yet. You can hire a professional tutor to get the answer.
Phosphoric acid is a moderately weak triprotic acid that can lose 3 protons according to the following series of reactions:
Phosphoric acid is a moderately weak triprotic acid that can lose 3 protons according to the following series of reactions:
????3????????4+????2????→????3????++????2????????4 − Ka1 = 7.5 x 10-3
????2????????4 −+????2????→????3????++????????????4 2− Ka2 = 6.2 x 10-8
????????????4 2−+????2????→????3????++????????4 3− Ka3 = 2.2 x 10-13
• Write down the equilibrium expressions for each of these reactions
• Would a mixture of phosphoric acid (H3PO4) and sodium dihydrogen phosphate (NaH2PO4) be considered a buffer? Explain?
• Would a mixture of sodium dihydrogen phosphate (NaH2PO4) and sodium hydrogen phosphate (Na2HPO4) also be considered a buffer? Explain?
• What would be the pH of a solution that is 0.1 M in dihydrogen phosphate (????2????????4 −) and 0.1 M in hydrogen phosphate (????????????4 2−)?
