Solubility rules of ionic compounds in water
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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 |
| Hydroxides, OH- | Group IA, Group IIA (Ca*, Sr, Ba) |
ALL |
| Sulfides, S2- | Group IA, Group IIA, (NH4)2S |
ALL |
| Phosphates, PO43- | Group IA, (NH4)3PO4 |
ALL |
| Carbonates, CO32- | Group IA, (NH4)2CO3 |
ALL |
*Ca(OH)2, CaSO4 are moderately soluble.
Content suitability
BCIT courses: CHEM 0011
