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2x10⁻⁴ 2x10⁻⁴ 4x10⁻⁴
Ksp L(OH)2 = [L²⁺] [OH-]²
Ksp L(OH)2 = [2x10⁻⁴][4x10⁻⁴]²
Ksp L(OH)2 = 3,2 x10⁻¹¹
pH = 12
pOH = 14 - pH = 14 - 12 = 2
pOH = - log[OH-]
2 = - log[OH-]
[OH-] = 10⁻²
L(OH)2 => L²⁺ + 2 OH-
5x10⁻³ 5x10⁻³ 10⁻²
Ksp L(OH)2 = [L²⁺] [OH-]²
3,2 x10⁻¹¹ = [s] [10⁻²]²
s = 3,2 x10⁻⁷ M