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Ion solubility
| Question | Answer |
|---|---|
| Alkali metals | always soluble |
| ammonium ions | always soluble |
| nitrates | always soluble NO3- |
| bicarbonates | always soluble HCO3- |
| chlorates | always soluble ClO3- |
| perchlorates | always soluble ClO4- |
| acetates | always soluble CH3COO- |
| F | soluble (pb, hg, ag, mg, ba, ca, sr) |
| Cl | soluble (pb, hg, ag) |
| Br | soluble (pb, hg, ag) |
| I | soluble (pb, hg, ag) |
| SO4 | soluble (pb, hg, ag, ca, ba, sr) |
| metal phospates | insoluble (always ions) |
| metal chromates | insoluble (always ions) |
| metal dichromates | insoluble (always ions) |
| metal carbonates | insoluble (always ions) |
| metal sulfides | insoluble (always ions, ca, ba, sr) |
| metal oxides | insoluble (always ions) |
| metal hydroxides (except strong bases) | insoluble (always ions, strong bases, ca, ba, sr |
| HCl | strong acid |
| HBr | strong acid |
| HI | strong acid |
| HNO3 | strong acid |
| HClO4 | strong acid |
| H2SO4 | strong acid (H + HSO4, H + SO4) |
| strong acids | HCl, HBr, HI, HNO3, HClO4, H2SO4 |
| LiOH | strong base |
| NaOH | strong base |
| KOH | strong base |
| RbOH | strong base |
| CsOH | strong base |
| Ca(OH)2 | strong base |
| Ba(OH)2 | strong base |
| Sr(OH)2 | strong base |
| strong bases | LiOH, NaOH, KOH, RbOH, CsOH, Ca(OH)2, Ba(OH)2, Sr(OH)2 |
| alkali hydroxide strong bases | LiOH, NaOH, KOH, RbOH, CsOH |
| other hydroxide strong bases | Ca(OH)2, Ba(OH)2, Sr(OH)2 |