Hitunglah PH campuran dari 50 ml CH3OOH 1,5 M dengan 50 ml NAOH 0,1 M

CH3COOH + NaOH → CH3COONa + H2O

→ CH3COOH
m = 50ml x 1,5 = 75 mmol
r = 5 mmol
s = 70 mmol

→ NaOH
m = 50 x 0,1 = 5 mmol
r = 5 mmol
s = -

→ CH3COONa
m = -
r = 5 mmol
s = 5 mmol

→ H2O
m = -
r = 5 mmol
s = 5 mmol

[H+] = Ka (mol sisa asam / sisa garam)
[H+] = 10^-5 (70 / 5)
[H+] = 10^-5 x 14
[H+] = 14 x 10^-5

pH = -log [H+]
pH = -log 14 x 10^-5
pH = 5 - log14
pH = 3,85