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s 2s s
K2CrO4 ==> 2 K⁺ + CrO4²⁻
0,01 0,02 0,01
Ksp Ag2CrO4 = [Ag⁺]² [CrO4²⁻]
4 x10⁻¹² = [2s]² [0,01]
4 x10⁻¹² = 4s² [0,01]
s² = 10⁻¹⁰
s = 10⁻⁵ mol/liter