[spiderman1441]

HI ,

   PLEASE HELP ME TO SOLVE THIS QUESTION

claculate the pH change that occurs as result of addition of 1.00 ml mole a strong acid and 100ml of the following solutions:

1) H₂O

2) 0.05 M OF NH₃

3) 0.05 M OF NH₄

4) 0.05 OF NH₃  + 0.05 OF NH₄CL

Kb = 1.0 x10^-5