• Reactions of metals with oxygen

• Calcium will burn in air (oxygen) when its strongly heated giving a brick red flame. The product formed is a white powder of calcium oxide.

2Ca(s) + O2 (g)                        2CaO(s)

• When we heat magnesium strongly, it burns with a bright white flame and will produce a white solid which is called Magnesium oxide.

Mg(s) + O2 (g)                       MgO(s)

• When iron is strongly heated in air, a black solid is formed called TRI-IRON TETRAOXIDE.

3Fe(s) + 2O2 (g)                         Fe3O4(s)

• When copper is strongly heated In air it forms COPPER(ii)OXIDE.

2Cu(s) + O2(g)                                 2CuO(g)

• Reaction of non metals with oxygen

• When sulphur is heated in air, it burns with a blue flame and the solid disappears.

S(s) + O2                               SO2 (g)

• Hydrogen will burn in air with a blue flame to form water vapour.

2H2 (g) + O2 (g)                        2H2O (g)

• Reaction of oxygen other compounds ( cooking gas)

• Fill a test tube with cooking gas (BUTANE) and bring a lightened match stick to the mouth of the test tube, you will observe that the cooking gas burns with a bluish yellow flame to produce CARBONDIOXIDE AND WATER.

C4H10 (g) + 13/2O2 (g)                                 4CO2(g) + 5H2O