Negative ion Plus Positive Ion Forms a is (anion) (cation) compound Which 1. Any ion + Alkali ions (Li+, Na+, K+, Rb+, or Cs+) Soluble, “ i.e. 0.1 mol/liter 2. Any ion + Ammonium, NH4+ Soluble “ 3. Nitrate, NO3- + Any cation Soluble “ 4. Acetate, CH3COO- + Any cation except Ag+ Soluble “ 5. Chloride, Cl- or + Ag+, Pb2+, Hg2+, or Cu+ Not Soluble “ Bromide, Br- or + Any cation Soluble “ Iodide, I- + 6. Sulfate, SO42- + Ca2+, Sr2+, Ba2+, Ra2+, Ag+, or Pb2+ Not soluble “ + Any other cation Soluble “ 7. Sulfide, S2- + Alkali ions or NH4+ Soluble “ + Be2+, Mg2+, Ca2+, Sr2+, Ba2+, or Ra2+ Soluble “ + Any other cation Not Soluble “ 8. Hydroxide, OH- + Alkali ions or NH4+ Soluble “ + Sr2+, Ba2+, or Ra2+ Soluble “ + Any other cation Not Soluble “ 9. Phosphate, PO43+ or + Alkali ions or NH4+ Soluble “ Carbonate, CO32- or + Any other cation Not Soluble “ Sulfite, SO32-
Negative ion (anion) 1. Any ion 2. Any ion 3. Nitrate, NO3- 4. Acetate, CH3COO- 5. Chloride, Cl- or Bromide, Br- or Iodide, I- 6. Sulfate, SO42- 7. Sulfide, S2- 8. Hydroxide, OH- 9. Phosphate, PO43+ or Carbonate, CO32- or Sulfite, SO32- Plus + + + + + + + + + + + + + + + + + Positive Ion (cation) Alkali ions (Li+, Na+, K+, Rb+, or Cs+) Ammonium, NH4+ Any cation Any cation except Ag+ Ag+, Pb2+, Hg2+, or Cu+ Any cation Ca2+, Sr2+, Ba2+, Ra2+, Ag+, or Pb2+ Any other cation Alkali ions or NH4+ Be2+, Mg2+, Ca2+, Sr2+, Ba2+, or Ra2+ Any other cation Alkali ions or NH4+ Sr2+, Ba2+, or Ra2+ Any other cation Alkali ions or NH4+ Any other cation Forms a compound Which “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ is Soluble, i.e. 0.1 mol/liter Soluble Soluble Soluble Not Soluble Soluble Not soluble Soluble Soluble Soluble Not Soluble Soluble Soluble Not Soluble Soluble Not Soluble