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Predicting a halogen displacement reaction
The elements in Group 7 are called the halogens. A more reactive halogen can displace a less reactive halogen from a solution of its salt.
Which combination of solutions will produce a reaction when mixed? Tick one box.
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Marking points
- 1 Selects ‘Chlorine and potassium bromide’.
Why this answer loses marks
Any mixture containing chlorine will react.
Compare both halogens: the free halogen must sit above the salt’s halogen in reactivity.