Find the pH of 0142 M phenol CgH5OH The hH bonded to the O i

Find the pH of 0.142 M phenol, CgH5OH. The hH bonded to the O is acidic, that is, GH50h(aq) +H2O(l)- H30 (aq) + C6H50 (aq). Ka = 1.0 x 10 M. 6 5 -10

Solution

pH of phenol = 1/2(pka-logC)

pka = -log(1.0*10^-10) = 10

C = concentration of phenol = 0.142 M

pH = 1/2(10-log0.142) = 5.423