Solubility rules


Salts solubility rules


  • Group I and ammonium (NH4+) compounds
  • Nitrates
  • Acetates (Ethanoates)
  • Chlorides, bromides and iodides except: Silver (Ag+), Lead(II) (Pb2+), Mercury(I) (Hg22+), Copper (Cu+)
  • Sulfates except: Silver (Ag+), Lead (Pb2+), Barium (II) (Ba2+), Strontium(II) (Sr2+) and Calcium(II) (Ca2+)


  • Carbonates except Group I, ammonium (NH4+) and Uranyl compounds
  • Sulfites except Group I and NH4+ compounds
  • Phosphates except Group I and NH4+ compounds
  • Hydroxides and Oxides except Group I, NH4+, Barium (Ba2+), Strontium (Sr2+) and Thallium (Tl+)
  • Sulfides except Group I, Group II and NH4+ compounds

For a detailed chart of solubility go to our SOLUBILITY CHART

Organic compounds solubility rules

"Like dissolves like"

To determine solubility of organic compounds usually the rule Like dissolves like is applied. This means that a solute will dissolve best in a solvent that has the same or similar polarity.