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Chemistry
Chemistry
Problem
A buffer is made by mixing 250 mL of 0.10 M acetic acid with 250 mL of 0.10 M sodium acetate. What is the greatest volume of 0.50 M HCl that can be added before the pH drops below 4.50? (
p
K
a
pK_a
p
K
a
for acetic acid = 4.74.) a)
10
mL
10\,\text{mL}
10
mL
b)
25
mL
25\,\text{mL}
25
mL
c)
13
mL
13\,\text{mL}
13
mL
d)
6.7
mL
6.7\,\text{mL}
6.7
mL
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