We are asked which ions in solution will remain unreacted after ammonium phosphate and calcium chloride are mixed.
We’ll use the solubility rules to answer this problem.
•Soluble Ionic Compounds:
▪ Group 1A ions (Li+, Na+, K+, etc.) and Ammoniumion (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+
Which ions remain in solution, unreacted, after each of the following pairs of solutions is mixed?
ammonium phosphate and calcium chloride
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