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Ba⁺ = = = 0,05 = 5 . 10⁻²
CO₃⁻ = = = 0,05 = 5 . 10⁻²
BaCO₃ => Ba⁺ + CO₃⁻
Qsp BaCO₃ = [Ba⁺] + [CO₃⁻]
= (5 . 10⁻²) (5 . 10⁻²)
= 2,5 . 10⁻³
Ksp BaCO₃ = 8,1 . 10⁻⁹
jadi, 2,5 . 10⁻³ > 8,1 . 10⁻⁹ ⇒ Qsp > Ksp => terbentuk endapan