49. The solubility of Mg(OH)₂(s) in water at a certain temperature is 1.1x10^-4 mol/L. Calculate the value of K_sp for Mg(OH)₂(s) at this temperature.
(A) 1.1 x 10^-4
(B) 1.3 x 10^-12
(C) 1.2 x 10^-8
(D) 5.3 x 10^-12
(E) none of these

考點觀念本題在測驗考生對**溶度積常數...