A 65.5-mL sample of 0.14 M HNO2 (Ka = 4.0 * 10-4) is titrated with 0.11 M NaOH. What is the pH after 26.8 mL of NaOH has been added?
A) 10.28
B) 7.00
C) 3.72
D) 2.91
E) 3.07
Correct Answer:
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