Question

When chlorine is bubbled through hot concentrated sodium hydroxide solution, sodium chlorate(V), sodium chloride and water are formed.

1. Write an equation for the reaction.
2. Sodium chlorate(V) and sodium chloride have different solubilities in water. Name a method that can be used to separate the salts.
3. Give one use of sodium chlorate(V).

Answer 1

1. 3Cl_2(g) + 6NaOH_(aq) → NaClO_3(aq) + 5 NaCl_(aq) + 3H₂O_(l)
2. Fractional crystallisation
3.  
   1. Herbicides
   2. Manufacture of dyes
   3. Bleaching agent
   4. Treatment of sewage
   5. In fireworks and explosives/matches.