Page 9 - Curriculum Visions Dynamic Book

 Reactions between elements and compounds are often very slow at room temperature. To speed up the rate of reaction, the copper oxide is heated using the flame from a Bunsen burner.
The blue flame coming from the small hole in the tube is produced by burning carbon monoxide gas. Notice that the copper oxide
is glowing orange on the surface, which shows that the oxygen has been removed.
 Eventually all of the oxygen is removed from the copper oxide powder, and only copper is left.
Copper
EQUATION: Reduction of copper oxide to copper
Copper oxide + carbon monoxide ➪ copper + carbon dioxide CuO(s) + CO(g) ➪ Cu(s) + CO2(g)
◆ +➡+
Carbon
oxide: a compound that includes oxygen and one other element.
reduction: the removal of oxygen from a substance. Close-up of the end of the tube showing the carbon
monoxide gas burning with a blue flame.
Oxygen
9
9