Group VII Displacement Reactions
Lesson 8.6

Group VII Displacement Reactions

Trend in reactivity Reactivity of the Group VII elements decreases down the group: chlorine…

Lesson objectives
Predict and explain displacement reactions between halogens and halide solutions, using colour changes, reactivity trends and ionic equations.
Lesson content
1

Reactivity of the halogens

Trend in reactivity Reactivity of the Group VII elements decreases down the group: chlorine…

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Carrying out the test

Pour about 2 cm3 of a halide solution (KCl, KBr or KI) into each…

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Results grid

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Equations

Chlorine and potassium bromide 2KBr(aq) + Cl2(aq) → 2KCl(aq) + Br2(aq) The solution changes…

Why displacement happens (HT only) Group VII Displacement Reactions5

Why displacement happens (HT only)

Stronger electron attraction The more reactive halogen has a greater tendency to gain electrons.

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Key terms

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Avoid these mistakes

Saying a halogen displaces a more reactive halide. A halogen only displaces halides of…
Lesson progress
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