A buffered solution containing dissolved aniline, C 6 H 5 NH 2 , and aniline hydrochloride, C 6 H 5 NH 3 Cl , has a pH of 5.34 . A. Determine the concentration of C 6 H 5 NH 3 in the solution if the concentration of C 6 H 5 NH 2 is 0.245 M. The p K b of aniline is 9.13.

Answer : The  concentration of is, 0.0830 M

Explanation : Given,

Concentration of = 0.245 M

pH = 5.34

First we have to calculate the value of pOH.

Now we have to calculate the concentration of

Using Henderson Hesselbach equation :

Now put all the given values in this expression, we get:

Therefore, the concentration of is, 0.0830 M

the answer to your question is c