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mr = 175
V = 1liter
Ksp = ?
M = (m/mr) : V
= (0,35/175) : 1
= 0,002
= 2x10^-3
BaF₂ --> Ba²⁺ + 2F⁻
s s 2s
Ksp = [Ba²⁺] [F⁻]²
= s [2s]²
= s . 4s²
= 4s³
= 4 (2x10^-3)³
= 4 (8x10^-9)
= 32x10^-9