The following table summarizes the solubility ionic compounds in water formed with these common anions . Use this as a guide to predict products of chemical reactions for double-replacement reactions.
|
Anions
|
Soluble
|
Insoluble
|
| Nitrates, NO3– | ALL | – |
| Acetates, C2H3O2– | ALL | – |
| Chlorides, Cl– | ALL, except … | AgCl, Hg2Cl2, PbCl2 |
| Sulfates, SO42- | ALL*, except … | BaSO4, SrSO4, PbSO4 |
| Salts of group IA | ALL | – |
| Salts of ammonium, NH4+ | ALL | – |
| Acids | ALL | – |
| Oxides, O2– | Group IA, Group IIA (Ca, Sr, Ba) |
ALL OTHER |
| Hydroxides, OH– | Group IA, Group IIA (Ca*, Sr, Ba) |
ALL OTHER |
| Sulfides, S2- | Group IA, Group IIA, (NH4)2S | ALL OTHER |
| Phosphates, PO43- | Group IA, (NH4)3PO4 | ALL OTHER |
| Carbonates, CO32- | Group IA, (NH4)2CO3 | ALL OTHER |
* Ca(OH)2, CaSO4 are moderately soluble.