The pH of aqueous solution of magnesium hydroxide is 9.0. If K s p of magnesium hydroxide is 1.0 × 10 − 11 M 3 , then the concentration of magnesium ions in the solution is

Step-by-step solution

p H = 9 So [ H + ] = 1 0 - 9 m o l L - 1 or [ O H - ] = 1 0 - 5 m o l L - 1 K s p [ M g ( O H ) 2 ] = [ M g 2 + ] [ O H - ] 2 So Mg 2 + = 1 × 10 − 11 ( 10 − 5 ) 2 = 10 − 1 = 0.1 M