Question

Bila Ksp CaF2 = 4.10pangkat-11 , kelarutan CaF2 dalam 0,01M CaCl2 adalah.. ????

Answer 1

CaF2 -----> Ca2+ + 2F-
s                s         2s

Ksp = [Ca2+] [F-]^2
4 x 10^-11 = 10^-2 x (2s)^2
4 x 10^-9 = 4s^2
s^2 = 10^-9
s = 10^-4,5