Which of the following would be an appropriate choice to buffer solution pH at pH 9 0 Select one a b 0 1 M HIO K 2 3 x 10 11 and

Question

Which of the following would be an appropriate choice to buffer solution pH at pH 9 0 Select one a b 0 1 M HIO K 2 3 x 10 11 and 0 1 M KIO 0 1 M HBrO Ka 2 0 x 10 9 and 0 1 M KBrO 0 1 M HF K 6 8 x 10 4 and 0 1 M KF c d 0 1 M HCIO K 3 0 x 10 8 and 0 1 M KCIO e 0 1 M HC3H5O2 Ka 1 3 x 10 5 and 0 1 M KC3H502

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