Reaction of Chlorine with NaOH

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9 Terms

1
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The products of the reaction of chorine with sodium hydroxide depends on what?

The temperature used.

2
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How does chlorine react with cold dilute sodium hydroxide, NaOH?

Cl2​(g) + 2NaOH (aq)→ NaCl(aq) + NaOCl (aq)+H2​O(l)

Sodium chloride (NaCl), and sodium chlorate (I) (NaOCl) is formed.

3
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How does chlorine react with heated concentrated sodium hydroxide, NaOH?

3Cl2​(g) + 6NaOH(aq) → 5NaCl + NaClO3​ (aq) + 3H2​O(l)

Sodium chloride (NaCl), and sodium chlorate (V) (NaClO3) is formed.

4
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The reaction of chlorine with sodium hydroxide is an example of what?

A disproportionation reaction.

5
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What is a disproportionation reaction?

A reaction where atoms of the same element become oxidised and reduced to form different products.

6
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Chlorine is used…

In the disinfection of water supplies.

7
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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.

8
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State a use for sodium chlorate (V).

Weedkiller.

9
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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.