28. How many moles of Ca(NO3)2 must be added to 0.5 L of a 0.4 M KF solution to begin precipitationo
問題詳情
28. How many moles of Ca(NO3)2 must be added to 0.5 L of a 0.4 M KF solution to begin precipitationof CaF2? For CaF2, Ksp = 4.0 ✖ 10–11. (A) 2.0 ✖ 10–12 (B) 1.0 ✖ 10–10 (C) 2.0 ✖10–10 (D)1.0 ✖ 10–9 (E) 5.0 ✖10–9