1.

Let the solubility of an aqueous solution of Mg(OH)_(2) be x then its K_(sp) is

Answer»

`4 x^(3)`
`108 x^(5)`
`27 x^(4)`
9x

Solution :`{:(Mg(OH)_(2)hArr,Mg^(++)+,,2OH^(-)),(,(X),,(2X)^(2)):}`
`K_(sp) = 4X^(3)`


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