If 20.0 mL of a 0.10 M NaOH solution is added to a 30.0- mL sample of
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If 20.0 mL of a 0.10 M NaOH solution is added to a 30.0- mL sample of a 0.10 M weak acid, HA, what is the pH of the resulting solution? (Ka = 1.8 × 105 for HA)
a. 2.87
b. 2.74
c. 4.74
d. 5.05
e. 8.73
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