試題詳解

63. What mass of Ba(IO₃)₂ (487 g/mol) (Ksp = 1.57 × 10^-9) can be dissolved in 400.0 mL of water at 25℃?
(A) 0.732 mg
(B) 5.45 mg
(C) 0.142 g
(D) 0.178 g
(E) 0.280 g