HF <------->Â Â H+
+Â Â F-
Initial            0.1                     0         0
Change         -
x                     +x       +x
Equilibrium
(0.1-x)                  x         x
Ka = 3.53 * 10-4 = x. x / (0.1-x)
x = 0.005767
Percent ionization = ( Ionized concentration /
unionizedconcentration ) * 100
                           =
( 0.005767 / 0.1) * 100
                           =5.767
%
