• Soluble
    • Group 1 and ammonium salts, nitrates, chlorides except AgCl and lead chloride, sulphates except BaSO4, SrSO4 and lead sulphate (CaSO4 and AgSO4 are slightly soluble)
  • Insoluble
    • Carbonates except Group 1 and ammonium, hydroxides except Group 1, barium and ammonium (Ca and Sr slightly soluble)
  • Barium
    • Forming white precipitate of barium sulphate with sulphate ions, on adding HCl precipitate remains
    • Forming white precipitate of barium sulphite with SO3 2-, dissolves with no fizzing in HCl
  • Solubility of Group 2 sulfates decrease down the group (Calcium sulfate is between soluble and insoluble)
  • Solubility of Group 2 hydroxides increase down the group (from calcium hydroxide slightly soluble)
  • Carbonates and Nitrates of Group 1/2 follows same pattern of thermal stability within group
  • From sodium carbonate down Group 1 carbonates do not decompose on heating
  • From sodium nitrate down Group 1 nitrates decompose to form Nitrite and oxygen
  • Lithium Carbonate and Group 2 carbonates decomposes and form CO2 + corresponding oxide
  • Lithium Nitrate and Group 2 nitrates decomposes to form oxygen, nitrogen oxide and corresponding oxide e.g. 4LiNO3 → 2Li2O + 4NO2 + O2
  • Calcium and elements below react with water to form hydrogen gas + corresponding hydroxide
  • Beryllium does not react water because of formation of insoluble oxide layer
  • Magnesium reacts very slowly with cold water but react vigorously with steam to give magnesium oxide which is almost insoluble
  • From calcium down the group the oxides react with water to form the corresponding hydroxides