[mjohnston995]

I am a bit stuck on this question:

A buffer solution is prepared by mixing 0.08L of 0.0601M pyridinium chloride with 0.0418L of 0.0531M pyridine. Calculate the pH of this solution. Assume the 5% approximation is valid and the volumes are additive.

I also have a table where the pKb of pyridine is 8.75. I am just not sure on how to approach this question.

[Borek]

This is just a plug and chug into Henderson-Hasselbalch equation. See if these examples:

http://www.chembuddy.com/?left=buffers&right=composition-calculation

won't help.