Ammonia, NH3, is a base that ionizes to give NH4+ and OH (Kb = 1.8 10-5).

Question:

Ammonia, NH3, is a base that ionizes to give NH4+ and OH (Kb = 1.8 × 10-5). You add magnesium sulfate to an ammonia solution. Calculate the concentration of Mg2+ ion when magnesium hydroxide, Mg(OH)2, just begins to precipitate from 0.10 M NH3. Ksp for Mg(OH)2 is 1.8 × 10-11.