At equilibrium:
CaF2 <----> Ca2+ + 2 F-
s 2s
S = [Ca2+] = 2.4*10^-4 M
Ksp = [Ca2+][F-]^2
Ksp = (s)*(2s)^2
Ksp = 4(s)^3
Ksp = 4(2.4*10^-4)^3
Ksp = 5.5*10^-11
Answer: OPTION 4
55. In a saturated solution of calcium fluoride, the concentration of the calcium ions is measured...
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