ChemistryCode 9701

The reactions of chlorine

What this topic asks you to be able to do

  • describe and interpret, by following the changes in oxidation number, how chlorine reacts with aqueous sodium hydroxide, both cold and hot, and recognise both as disproportionation reactions
  • account for chlorine's role in purifying water, including by way of an equation, covering the formation of the active species HOCl and ClO– that destroy bacteria