8.3.3

The Halogen - Displacement 1

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Displacement Reactions - Halogens

More reactive substances can displace (replace) less reactive substances from compounds. For example, chlorine can displace bromine from a compound:

Illustrative background for Displacement reactionIllustrative background for Displacement reaction ?? "content

Displacement reaction

  • Sodium bromide + chlorine → sodium chloride + bromine.
  • 2NaBr + Cl2 → 2NaCl + Br2
Illustrative background for Bromide ions (Br<sup>-</sup>)Illustrative background for Bromide ions (Br<sup>-</sup>) ?? "content

Bromide ions (Br-)

  • Bromide ions are oxidised (electrons are lost):
    • 2Br- → Br2 +2e-.
Illustrative background for Chlorine (Cl<sub>2</sub>)Illustrative background for Chlorine (Cl<sub>2</sub>) ?? "content

Chlorine (Cl2)

  • Chlorine is reduced (electrons are gained):
    • Cl2 + 2e- → 2Cl-.
Illustrative background for Spectator ionsIllustrative background for Spectator ions ?? "content

Spectator ions

  • The sodium ions do not change in the reaction, so we call them spectator ions.

Jump to other topics

1States of Matter

2Atoms, Elements & Compounds

3Stoichometry

4Electrochemistry

5Chemical Energetics

6Chemical Reactions

7Acids, Bases & Salts

8The Periodic Table

9Metals

10Chemistry of the Environment

11Organic Chemistry

11.1Formulae, Functional Groups & Terminology

11.2Naming Organic Compounds

11.3Fuels

11.4Alkanes

11.5Alkenes

11.6Alcohols

11.7Carboxylic Acids

11.8Polymers

12Experimental Techniques & Chemical Analysis

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