Hitung ph campuran 300ml larutan NH4OH 0,5 M(kb NH4OH=1,8×10pangkat negatif 5)dengan 250ml larutan HCL 0,1M

n NH4OH = 150 mmol
n HCl = 25 mmol

NH4OH + HCL ---->>> NH4CL + H2O
150............25............
25...............25......................25.......25...........
125.............-............................25.......25......

OH- = Kb nb/ng
= 18.10^-6 125/25
= 90.10^-6
= 9.10^-5 M

pOH = 5 - log 9
pH = 9 + log 9