Group 2

    Cards (9)

    • Reactivity
      Increases as you go down the group because of increased electron shielding and weaker attraction to nucleus.
    • Melting point
      Decreases as you go down the group because they are metallic. The attractive forces decrease as they have to act over a larger distance as the electrons are further from the nucleus ( bigger ionic radius)
    • Reactions with water:
      ( Replacing and G2 metal with Mg)
    • Magnesium with steam
      Reacts quickly with steam. Burns with a bright white flame to create Magnesium Oxide and Hydrogen
    • Group 2 Hydroxides
      • Solubility increases down the group with Magnesium Hydroxide being insoluble and Barium Hydroxide being the most soluble
      • Magnesium Hydroxide used as an antacid
    • Group 2 Sulfates
      • Solubility decreases down the group. Magnesium Sulfate is the most soluble and Barium Sulfate is insoluble
      • Barium Sulfate used as barium meal to see internal tissues, it is toxic if enters bloodstream but is insoluble so can not be absorbed
      • To test for sulfate ions Barium Chloride can be used, a white precipitate is formed when sulfate ions are present
    • Extraction of Titanium
      Magnesium is used in the extraction of Titanium via displacement reaction
    • Test for sulfate ions
      Barium Chloride- forms a white precipitate when sulfate ions are present
    • Half equation for Barium sulfate
      Ba2++Ba^{2+}+SO42BaSO4SO_4^{2-}\rightarrow BaSO_4^{ }