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Consider a buffer composed of aqueous HA and A- . The Ka for HA is 3.7...

Consider a buffer composed of aqueous HA and A- . The Ka for HA is 3.7 x 10-9 . Which of the following combinations of reagents will produce an HA / A- buffer with pH 8.13? A. 0.80 mol of HA and 0.40 mol of A - B. 0.80 mol of HCl and 1.20 mol of A - C. none of these D. 1.20 mol of HA and 0.40 mol of NaOH E. all of these

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