General Chemistry
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Identify the conjugate acid and base of H2PO3–.
Provide the Ka expressions for the ionization of citric acid (H3C6H5O7).
Citric acid (HOC(CO2H)(CH2CO2H)2) is a weak triprotic acid. Write balanced dissociation equations and corresponding equilibrium expressions for each dissociation step.
Which of the following is correct based on the relationship of the successive pKa and Kb values for most polyprotic acids?
I. Ka1 < Kb1
II. Ka1 > Ka2 > Ka3
III. pKa3 > pKa2 > pKa1
IV. Kb1 > Kb2 > Kb3
V. pKb1 > pKb2 > pKb3