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Mg(OH)₂
pH = 11
Ditanya : Ksp?
Jawab :
pH = 11
pOH = 14 - 11 = 3
[OH-] = 10⁻³
Reaksi ionisasi Mg(OH)₂ :
Mg(OH)₂ ---> Mg²⁺ + 2 OH⁻
s s 2s
Ksp Mg(OH)₂
= s x s²
= (5x10⁻⁴) x (10⁻³)²
= 5 x 10⁻¹⁰
Jadi, harga Ksp Mg(OH)₂ 5 x 10⁻¹⁰.