8. Add a solution of CaCl2 to a saturated solution of BaF2 in the same volume, dissolve 0.0440 g of salt in 1 liter of calcium chloride solution for preparation. Prove the process of formation, formation of CaF2 precipitate in the system using Sept. (M (CaCl2) = 110.98 g / mol; Ks (CaF2) = 4 * 10-11).

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