Question

Determine the ksp for magnesium hydroxide (mg(oh)2) where the solubility of mg(oh)2 is 1.4 ⋅ 10-4 m. determine the ksp for magnesium hydroxide (mg(oh)2) where the solubility of mg(oh)2 is 1.4 10-4 m. 1.4 ⋅ 10-4 3.9 ⋅ 10-8 2.7 ⋅ 10-12 1.1 ⋅ 10-11 2.0 ⋅ 10-8

Answer 1

Answer is: Ksp for magnesium hydroxide is 1,1·10⁻¹¹.
Chemical reaction: Mg(OH)₂(s) → Mg²⁺(aq) + 2OH⁻(aq).
s(Mg(OH)₂) = 1,4·10⁻⁴ M.
s(Mg(OH)₂) = s(Mg²⁺).
s(OH⁻) = 2s(Mg(OH)₂).
Ksp = s(Mg²⁺) · (s(OH⁻))².
Ksp = 1,4·10⁻⁴ M · (2,8·10⁻⁴ M)².
Ksp = 1,1·10⁻¹¹.