contestada

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 5.47 . 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 0.215 M. The p K b of aniline is 9.13.

Respuesta :

emaikwuvictor

Answer: the concentration of C6H5 NH3+ = 0.031M

Explanation:

From question pH= 5.47

pH+pOH= 14

pOH= 14-5.47= 8.53

Using the Henderson Hasselbalch equation

pOH =pKb + log (salt/base)

8.53 = 9.13 + log(salt/0.125)

8.53-9.13= log(salt/0.125)

-0.6= log(salt/0.125)

Antilog (-0.6)=salt/0.125

0.251= salt/0.125

Salt conc.= 0.125×0.251=0.031M

Otras preguntas

Q&A Education