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2. What is the ionic equation for a metal carbonate and (HCl) acid reaction?

  • CO3^2- (s) + 2H+ -> CO2 (g) + H2O (l)
  • M2CO3 (s) + 2 HCl (aq) -> 2MCl (aq) + CO2 (g) + H2O (l)
  • M (s) + 2H+ (aq) -> Mg2+ (aq) + H2 (g)
  • OH- (aq) + H+ (aq) -> H2O (l)

3. What are the two main indicators for acid/alkali reactions when using a titration?

  • methyl green and universal indicator
  • methyl orange and phenolphthalein
  • methylpropane and universal indicators
  • orcein and phenolphthalein

4. What are the products when a metal oxide reacts with an acid?

  • salt
  • salt + hydrogen gas
  • salt + water
  • salt + carbon dioxide + water

5. Why can water molecules become fixed in an ionic lattice?

  • The addition of water molecules makes covalent bonds form that are hard to break so the water molecules are fixed in the lattice.
  • Because the water molecules are not polar so can attract the ions and be held into place in the ionic lattice
  • Water molecules are polar. They're held in place in the lattice because they are easily attracted to the ions creating a giant ionic lattice
  • Water molecules create extra intermolecular forces like hydrogen bonds that mean they are fixed in the ionic lattice
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