P.3 oxdides

• what 3 oxides are ionic?

  Na2O MgO Al2O3
• What oxide is giant covalent?

  SiO2
• What 3 oxides are molecular?

  P4O10 SO2 SO3
• What 2 oxides are insoluble (don't react with water)?

  Al2O3 and SiO2
• Na2O and water

  equation: Na2O + H2O -> 2 NaOH (aq)
• MgO and water:

  equation: MgO + H2O -> Mg(OH)2 (aq)
• P4O10 with water:

  equation: P4O10 + 6 H2O -> 4 H3PO4
• what 2 oxides only dissolve in water?

  Na2O and MgO
• What 3 oxides react with water?

  P4O10 SO2 and SO3
• SO2 and SO3 with water:

  SO2 + H2O -> H2SO3

  SO3 + H2O -> H2SO4
• What 2 oxides are basic (react with acids)?

  Na2O and MgO
• What oxide is amphoteric (reacts with acids and alkalis)?

  Al2O3
• What 4 oxides are acidic (react with alkalis)?

  SiO2, P4O10, SO2 and SO3
• Na2O with acids:

  Na2O + 2 H+ -> 2 Na+ + H2O
• MgO with acids:

  MgO + 2 H+ -> Mg+ + H2O
• Al2O3 with acids:

  Al2O3 + 6 H+ -> 2 Al+ + 3 H2O
• Al2O3 with alkalis:

  Al2O3 + 2 OH- + 3 H2O -> 2 Al(OH)4 -
• SiO2 with alkalis:

  SiO2 + 2 OH- -> SiO3 2- + H2O
• P4O10 with alkalis:

  P4O10 + 12 OH- -> 4 PO4 3- + 6 H2O
• SO2 with alkalis:

  SO2 + 2 OH- -> SO3 2- + H2O
• SO3 with alkalis:

  SO3 + 2 OH- -> SO4 2- + H2O