Pyridine (P K _b = 8

Multiple Choice

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.