If 40 mL of 0.10 M NaOH is added to 50 mL of 0.20 M HC2H3O2, what is the pH of the resulting solution at 25°C? Ka for HC2H3O2 is 1.8 × 10-5 at 25°C.
a. 10.5
b. 4.3
c. 4.9
d. 2.7
e. 4.6
Answer: E
Chemistry
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