group 2

• What forms of magnesium is soluble?

  MgSO4 is soluble

  Mg(OH)2 is not
• What forms of calcium are soluble?

  Both CaSO4 and Ca(OH)2 are slightly soluble
• What forms of strontium and barium are soluble?

  Sr(OH)2 and Ba(OH)2 are soluble

  SrSO4 and BaSO4 are not
• What happens to reactivity as you go down group 2?

  Increases

  • G2 forms +2 ions
  • Atomic radius increases, so it's easier to lose outer electrons
• What is magnesium used in?

  Titanium extraction (reduction)
• What is magnesium hydroxide (Mg(OH)2) used for?

  Antacid and laxative
• What is calcium oxide (CaO) and calcium carbonate (CaCO3) used for?

  Purification of flue gases
• What is calcium hydroxide (Ca(OH)2) used for?

  Agriculture for neutralising acidic soil
• What is barium sulfate (BaSO4) used for?

  Used as a contrast agent for CT scans and x-rays
• What is acidified barium chloride (BaCl2)

  • Testing for sulfate ions as BaSO4 forms a white precipitate
  • The acid removes impurities from other salts