Question

a) Calculate the concentration of OH− in 1.54 M CH3CO2H.

b) Calculate the concentration of CH3CO2H in 0.0229 M CH3CO2H?

c) Calculate the concentration of OH− in 0.0229 M CH3CO2H?

d) Hippuric acid (HC9H8NO3), found in horse urine, has pKa=3.62. Calculate the concentration of HC9H8NO3 in 0.150 M hippuric acid?

Answer 1

           

Initial              1.54M                       0                   0

Final             (1.54-x)M                   xM                xM

Ka of acetic acid = 1.8 * 10^(-5)

assuming (1.54-x) is approximately equal to 1.54

b)

                 

Initial              0.0229M                       0                   0

Final             (0.0229-x)M                   xM                xM

Ka of acetic acid = 1.8 * 10^(-5)

assuming (0.0229-x) is approximately equal to 0.0229

c)

d)

                            

Initial                          0.150M                     0                   0

Final                         (0.150-x)                    x                    x

assuming 0.150-x is approximately equal to 0.150