The pKa of a weak acid was determined to be 3.39 by measuring the pH of a solution containing the weak acid at 0.20 M and its conjugate base. The measured pH was 3.27. What was the concentration of the conjugate base?
A) 0.26 M
B) 0.15 M
C) 0.20 M
D) 0.050 M
E) 0.35 M
Correct Answer:
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