Hippuric acid (HC9H8NO3)(HC9H8NO3), found in horse urine, has pKa=3.62pKa=3.62. Part A Calculate the pHpH in 0.140 MM hippuric acid. Express your answer to two decimal places.

The pH in 0.140 M hippuric acid solution is 2.2.

Explanation :

Dissociation constant of the acid =

Concentration of hippuric acid = c = 0.140 M

Initially

c           0     0

At equilibrium

(c-x)     x      x

Concentration of acid = c

Dissociation constant of an acid is given by:

Solving for x:

x = 0.005677 M

The pH of the solution :

The pH in 0.140 M hippuric acid solution is 2.2.