Determine the reagent that forms a precipitate in Pb2+ but not with Ba2+ using the solubility rules.
Soluble Ionic Compounds:
▪Group 1A ions (Li+, Na+, K+, etc.) and Ammonium ion (NH4+) are soluble
▪ Nitrates (NO3-), Acetates (CH3COO- or C2H3O2-), and most Perchlorates (ClO4-) are soluble
▪ Cl-, Br-, and I- are soluble except when paired with Ag+, Pb2+, Cu+, Hg22+
▪ Sulfates (SO42-) are soluble except those of Ca2+, Sr2+, Ba2+, Ag+, and Pb2+
If an aqueous solution of ____ is added to a mixture of Pb 2+ and Ba2+, the lead ion will precipitate, but the barium ion will remain in solution.