Question
Show that for an aqueous solution of a salt of weak base and strong acid,
.
Solution
Let the salt of strong acid and weak base be XY and hydrolysis reaction be represented as:
Let c be the initial concentration of the salt and α be the degree of hydrolysis. At equilibrium, the concentration of various species is represented as:
X+ + H2O 
XOH + H+
Initial conc.
c c 0 0
Equilibrium conc.
Since 
is very small as compared to unity,
