Group 2

• What is produced when a metal carbonate reacts with an acid?


  Salt, water, and CO₂
• What is the chemical formula for calcium carbonate?

  CaCO3
• What is the product of heating calcium carbonate?

  Calcium oxide (CaO)
• What is the product formed when calcium reacts with hydrochloric acid?

  Calcium chloride (CaCl₂)
• What gas is released when a metal carbonate reacts with an acid?

  Carbon dioxide (CO₂)
• What role does heat play in the reactions of calcium and its compounds?

  It facilitates the decomposition of calcium carbonate
• What is the product of the reaction between calcium hydroxide and hydrochloric acid?

  Calcium chloride (CaCl₂)
• What is the chemical formula for calcium hydroxide?

  Ca(OH)₂
• What is the trend in reactivity of Group 2 elements?

  It increases down the group
• What do the first and second ionisation energies indicate for Group 2 elements?

  They indicate the energy required to remove electrons
• What is the formula for magnesium hydroxide?

  Mg(OH)₂
• What is the formula for calcium carbonate?

  CaCO₃
• What is produced when a Group 2 metal reacts with water?

  Metal hydroxide and hydrogen
• What is produced when a Group 2 metal reacts with oxygen?

  Metal oxide
• What is produced when a Group 2 metal reacts with a halogen?

  Metal halide
• What is produced when a metal oxide or hydroxide reacts with an acid?

  Salt and water
• What is produced when a metal carbonate reacts with an acid?

  Salt, water, and carbon dioxide
• What is the role of magnesium hydroxide in antacids?

  It neutralizes stomach acid
• What is the role of calcium carbonate in antacids?

  It neutralizes stomach acid
• How do the reactions of Group 2 metals with acids differ from their reactions with water?

  Reactions with acids produce salts, while water produces hydroxides
• What are group 2 metals

  Bases ( proton acceptors)
• why are group 2 metals useful

  good to neutralise acids to form salt and water