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A 32.4 mL sample of a 0.540 M aqueous hypochlorous acid solution is titrated with a...

A 32.4 mL sample of a 0.540 M aqueous hypochlorous acid solution is titrated with a 0.317 M aqueous barium hydroxide solution. What is the pH after18.7 mL of base have been added?

Design a buffer that has a pH of 8.56 using one of the weak base/conjugate acid systems shown below.

Weak Base Kb Conjugate Acid Ka pKa
CH3NH2 4.2×10-4 CH3NH3+ 2.4×10-11 10.62
C6H15O3N 5.9×10-7 C6H15O3NH+ 1.7×10-8 7.77
C5H5N 1.5×10-9 C5H5NH+ 6.7×10-6 5.17

How many grams of the chloride salt of the conjugate acid must be combined with how many grams of the weak base, to produce 1.00 L of a buffer that is 1.00 M in the weak base?

grams chloride salt of conjugate acid =

grams weak base =

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