Pyridine (p K b = 8.74) reacts with formic acid (p K a = 3.74) to form the pyridinium ion and the formate ion:
C6H5N + HCOOH→C5H5NH+ + HCOO - Which of the following is true?
A) Pyridinium ion is a stronger acid than formic acid.
B) Formate ion is a stronger base than pyridine.
C) A solution which is 0.1 M pyridine and 0.1 M pyridinium chloride is basic.
D) A solution which is 0.1 M formic acid and 0.1 M sodium formate is basic.
E) A solution of 0.1 M pyridine and 0.1 M sodium formate is basic.
Correct Answer:
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