hitunglah pH dari larutan Ca(OH)2. 0,05M

Ca(OH)2
valensi OH- = 2

[OH-] = 2 × 0,05 M = 0,1 M

pOH = - log [OH-]
pOH = - log 0,1
pOH = 1

pH = 14 - pOH
pH = 14 - 1
pH = 13