# Problem: The base-dissociation constant, K b, for pyridine (C 5H 5N) is 1.4 × 10 −9.  The acid-dissociation constant, K a, for the pyridinium ion (C 5H 5NH +) is __________. A) 1.4 × 10 −23      B) 1.0 × 10 −7      C) 7.1 × 10 −4     D) 7.1 × 10 −6      E) 1.4 × 10 −5

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###### Problem Details

The base-dissociation constant, b, for pyridine (C 55N) is 1.4 × 10 −9.  The acid-dissociation constant, a, for the pyridinium ion (C 55NH +) is __________.

A) 1.4 × 10 −23

B) 1.0 × 10 −7

C) 7.1 × 10 −4

D) 7.1 × 10 −6

E) 1.4 × 10 −5

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Our tutors have indicated that to solve this problem you will need to apply the Ka and Kb concept. You can view video lessons to learn Ka and Kb. Or if you need more Ka and Kb practice, you can also practice Ka and Kb practice problems.

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Based on our data, we think this problem is relevant for Professor Chamusco's class at SF.