| How do we know when a substance will make ions when placed into solution? | |||
| Usually Soluble | Exceptions | Usually Insoluble | Exceptions |
| Ammonium NH4+ salts | Carbonates CO32- | NH4+ and alkali metals | |
| Alkali metal salts | Some Li+ | Phosphates PO43- | Na+, K+, and NH4+ |
| Nitrates NO3- | Hydroxides OH- | Ba2+ and alkali metals | |
| Cl-, Br-, I- | Ag+, Hg22+, Pb2+ | Sulfides S2- | NH4+ and salts of alkali metals |
| Acetates CH3COO- | Ag+, Al3+ | ||
| Chlorates ClO3- | |||
| Sulfates SO42- | Ba2+, Sr2+, Ca2+, Pb2+, Ag+, Hg2+, Hg22+ | ||