P.3 elements reactions

• Sodium with water:

  Equation: 2 Na + 2 H2O -> 2 NaOH +H2

  Observations: gas given off, colourless solution formed
• P.3 elements that react with water:

  sodium, magnesium, chlorine
• Which P.3 element reacts with both steam and water?

  magnesium
• Magnesium with steam:

  equation: Mg + H2O -> MgO + H2

  observations: gas given off, white flame
• Magnesium with water:

  equation: Mg + 2 H2O -> Mg(OH)2 + H2

  observations: gas given off, thin layer of Mg
• What's special about the reaction between chlorine and water?

  its reversible
• Chlorine with water:

  equation: Cl2 + H2O -> HCl + ClOH

  observations: green solution formed
• What P.3 element doesn't react with oxygen?

  Chlorine
• Sodium with oxygen:

  observations: yellow flame, white solid
• Magnesium with oxygen:

  observation: white solid
• Aluminium with oxygen:

  observation: white solid~
• Silicon with oxygen:

  observation: white solid
• Phosphorus with oxygen:

  equation: 4 P + 5 O2 -> P4O10

  observation: white solid
• Sulphur with oxygen:

  equation: S + O2 -> SO2

  observations: blue flame, choking gas