Tentukan pH larutan Ca (OH)2 0,05 m adalah... A.12. C.13 B.10. D.11 E.14

[OH-] = M*koef = 0.05*2 = 0.1
pOH = -log [OH-] = -log [0.1] = 1
pH = 14-pOH = 14-1 = 13