add KCl → K+ + Cl-
Hg22+ + Cl- → Hg2Cl2 → insoluble chloride → solid
Ba2+ + Cl- → BaCl2 → soluble chloride → aqueous
Fe2+ + Cl- → FeCl2 → soluble chloride → aqueous
A solution contains one or more of the following ions: Hg22+, Ba2+, and Fe2+. When potassium chloride is added to the solution, a precipitate forms. The precipitate is filtered off and potassium sulfate is added to the remaining solution, producing no precipitate. When potassium carbonate is added to the remaining solution, a precipitate forms.
Write net ionic equations for the formation of each of the precipitates observed.
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