Question

Design a buffer that has a pH of 6.65 using one of the weak acid/conjugate base...

Design a buffer that has a pH of 6.65 using one of the weak acid/conjugate base systems shown below.

Weak Acid Conjugate Base Ka pKa

HC2O4-

C2O42-

6.4×10-5

4.19

H2PO4-

HPO42-

6.2×10-8

7.21

HCO3-

CO32-

4.8×10-11

10.32



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

grams sodium salt of weak acid = g

grams sodium salt of conjugate base = g

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Answer #1

grams sodium salt of weak acid = 435.6 g

grams sodium salt of conjugate base = 142 g

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