At 2 5 ∘ C , the solubility product of Mg ( OH ) 2 is 1.0 × 1 0 − 11 . At which pH , will Mg 2 + ions start precipitating in the form of Mg ( OH ) 2 from a solution of 0.001 M Mg 2 + ions ?

Question

At 2 5 ∘ C , the solubility product of Mg ( OH ) 2 ​ is 1.0 × 1 0 − 11 . At which pH , will Mg 2 + ions start precipitating in the form of Mg ( OH ) 2 ​ from a solution of 0.001 M Mg 2 + ions ?

TestHub · Accepted Answer

Mg 2 + + 2 OH − ⇌ Mg ( OH ) 2 ​ K sp ​ = [ Mg 2 + ] [ OH − ] 2 [ OH − ] = [ Mg 2 + ] K sp ​ ​ ​ = 1 0 − 4 ∴ p OH = 4 and p H = 10

Chemistry - Ionic Equilibrium Question with Solution | TestHub

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