Question
Sat October 27, 2012 By:
 

calculate [H3O+]and pH of 0.1M solution of NH4NO3. Kb for NH3 is 1.8*10^-5.What per cent of salt is hydrolysed.

Expert Reply
Fri December 14, 2012
NH4+ + H2O ------------- NH3 + H3O+

Ka = 1X 10-14/1.8 X 10-5 = 5.6 X 10-10

5.6 X 10-10 =  x2  x  25

So, x = 1.2 X 10-5 M =[H3O+]
 
pH = - log 1.2 X 10-5 = 4.9
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