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Describe the displacement reactions of chlorine with other halogens

Describe the displacement reactions of chlorine with other halogens.

Answers

Kavungya
(i). Procedure:
- Chlorine is bubbled through aqueous solutions of fluoride, bromide and iodide ions contained in separate test tubes.
(ii). Observations and explanations:
- With fluoride ions.
- No observable change or no reaction; because chlorine is a weaker oxidizing agent than fluorine.
- With bromide ions:
- If potassium bromide was used, the colourless solution turns red-brown.
Reason:
- Chlorine has a higher tendency to gain electrons than bromine.
- It readily oxidizes bromide ions (in KBr) to form potassium chloride and bromine which immediately dissolves to make the solution red-brown.
fig429420191145.png

With iodide ions.
- Using potassium iodide the colourless solution would turn black.
Reason:
- Chlorine has a higher tendency to gain electrons that iodine.
- It readily oxidizes the I- (in KI) to form iodine and potassium chloride.
- Iodine solid in the resulting solution makes it black.
fig529420191146.png
Kavungya answered the question on April 29, 2019 at 08:47

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