Quizlet AP Chemistry: Solubility Rules for Common Ionic Compounds in Water

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  1. C2H3O2^1- (acetates): soluble (exception: AgC2H3O2 is moderately soluble.)
  2. CO3^2- (carbonates): insoluble (exception: with alkali metals or NH4^1+ [ammonium])
  3. ClO3^1- (chlorates): soluble
  4. ClO4^1- (perchlorates): soluble
  5. CrO4^2- (chromates): insoluble (exception: with alkali metals or NH4^1+ [ammonium])
  6. F- (fluorides): insoluble (exception: with alkali metals or NH4^1+ [ammonium])
  7. HCO3^1- (bicarbonates): soluble
  8. NH4^1+ (ammonium): soluble
  9. NO3^1- (nitrates): soluble
  10. OH- (hydroxides): insoluble (exceptions: with alkali metal ions or Ba^2+; Sr(OH)2 and Ca(OH)2 are moderately soluble)
  11. O^2- (oxides): insoluble (exception: alkali metals, NH4^1+ [ammonium], Ca^2+, Sr^2+ or Ba^2+ will react with water)
  12. PO4^3- (phosphates)soluble (exception: with alkali metals or NH4^1+ [ammonium]): insoluble (exception: with alkali metals or NH4^1+ [ammonium])
  13. SO3^2- (sulphites): insoluble (exception: with alkali metals or NH4^1+ [ammonium])
  14. SO4^2- (sulphates): soluble (exceptions: of Ag^1+. Ca^2+. Sr^2+. Ba^2+, Hg2^2+, Hg^2+, Pb^2+)
  15. S^2- (sulphides): insoluble (exception: with alkali metals, NH4^1+ [ammonium], Ca^2+, Sr^2+, Ba^2+)
  16. alkali metal ion compounds: soluble
  17. halides: soluble (exceptions: of Ag^1+, Hg2^2+, Pb^2+)