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*Kelarutan CaF2 = 2 x 10^-4
*Ksp CaF2 ?
Anggap kelarutan CaF2 = s, maka:
CaF2 ⇔ Ca2+ + 2F-
s 2s
Ksp = (s) (2s)^2
= 4(s)^3
= 4 (2 x 10^-4)^3
= 3,2 x 10^-11