Sebanyak 3,7gram Ca(OH)2 dilarutkan kedalam 10 liter air (Ar Ca= 40, O = 16, H = 1) Tentukan Ph larutan tersebut.

m=3,7 gr
Mr=74 gr/mol
n=m/Mr
n=3,7/74=0,05 mol
M=0,05/10
M=0,005 M=5*10^-3
[OH-]=M* V. Basa
[OH-]=5*10^-3 *2
[OH-]=10^-2
pOH=-log10^-2
pOH=2
pH=14-2=12