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The products of the reaction of chorine with sodium hydroxide depends on what?
The temperature used.
How does chlorine react with cold dilute sodium hydroxide, NaOH?
Cl2(g) + 2NaOH (aq)→ NaCl(aq) + NaOCl (aq)+H2O(l)
Sodium chloride (NaCl), and sodium chlorate (I) (NaOCl) is formed.
How does chlorine react with heated concentrated sodium hydroxide, NaOH?
3Cl2(g) + 6NaOH(aq) → 5NaCl + NaClO3 (aq) + 3H2O(l)
Sodium chloride (NaCl), and sodium chlorate (V) (NaClO3) is formed.
The reaction of chlorine with sodium hydroxide is an example of what?
A disproportionation reaction.
What is a disproportionation reaction?
A reaction where atoms of the same element become oxidised and reduced to form different products.
Chlorine is used…
In the disinfection of water supplies.
State a use for sodium chlorate (I).
Bleach.
Bleaching is an oxidation reaction in which the coloured form of the material or dye is turned colourless.
State a use for sodium chlorate (V).
Weedkiller.
State some uses of halogens and their compounds.
PTFE is used as a non-stick layer on frying pans and bearings.
PVC is a polymer used as waterproof coatings and window frames.
Silver bromide is used in traditional photographic film.
Iodine is used as an antiseptic.