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What is the pH of a solution prepared by dissolving 4.50 g sodium dihydrogen borate (83.82g/mol) in 650 mL of a 0.0725 M boric acid solution (Ka= 5.4 ́10–10). Ignore any changes in volume. A.9.27. D.9.40. B.9.21. E.9.32. C.9.14