Chapter15: Acid-base Equilibria
Section: Chapter Questions
Problem 8ALQ: You have a solution of the weak acid HA and add some of the salt NaA to it. What are the major...
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Which of the following pairs of solution would you use to prepare a buffer with pH = 7.45?
(A) Acetic acid + sodium acetate; (CH3CO2H has Ka = 1.8 x 10–5)
(B) Sodium dihydrogen phosphate + sodium hydrogen phosphate; (H2PO4– has Ka = 6.2 x 10–8)
(C) Ammonium chloride + ammonia; (NH3 has Kb = 1.8 x 10–5)
(D) Sodium hydrogen carbonate + sodium carbonate; (HCO3– has Ka = 5.6 x 10–11)
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