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Questions and Answers
Which statement about the solubility of halogens is true?
Which statement about the solubility of halogens is true?
What color does iodine appear in a non-aqueous solvent like hexane?
What color does iodine appear in a non-aqueous solvent like hexane?
What is the primary reason chlorine can displace bromine in a chemical reaction?
What is the primary reason chlorine can displace bromine in a chemical reaction?
What happens to the color of a solution when excess chlorine is added to potassium iodide?
What happens to the color of a solution when excess chlorine is added to potassium iodide?
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How does the reactivity of halogens change as you go down the group?
How does the reactivity of halogens change as you go down the group?
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Study Notes
Solubility of Halogens
- Halogens are poorly soluble in water (polar solvent) but more soluble in non-polar solvents like hexane
- Halogens readily transfer to hexane when shaken with a small volume of water
- The hexane layer becomes intensely coloured if the mixture is allowed to settle
- Chlorine (Cl2) in hexane is colourless
- Bromine (Br2) in hexane is orange
- Iodine (I2) in hexane is violet
- Chlorine (Cl2) in water is colourless
- Bromine (Br2) in water is orange
- Iodine (I2) in water is brown
Displacement Reactions of Halogens
- Halogen reactivity decreases down the group
- A more reactive halogen will displace a less reactive one from its halide
- Chlorine (Cl2) is a stronger oxidising agent than bromine (Br2) or iodine (I2)
- In displacement reactions, colours are used to indicate the products. Reactions are evident by colour changes.
Reactions with Excess Halogens
- Chlorine (Cl2) with excess Potassium Chloride (KCl): No colour change
- Chlorine (Cl2) with excess Potassium Bromide (KBr): Colourless (Cl2) to Orange (Br2)
- Chlorine (Cl2) with excess Potassium Iodide (KI): Colourless (Cl2) to Brown (I2)
- Bromine (Br2) with excess Potassium Chloride (KCl): No colour change
- Bromine (Br2) with excess Potassium Bromide (KBr): No colour change
- Bromine (Br2) with excess Potassium Iodide (KI): Orange (Br2) to Brown (I2)
- Iodine (I2) with excess Potassium Chloride (KCl): No colour change
- Iodine (I2) with excess Potassium Bromide (KBr): No colour change
- Iodine (I2) with excess Potassium Iodide (KI): No colour change
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Description
Test your knowledge on the solubility and displacement reactions of halogens. Explore how these elements interact with different solvents, and learn about their colors in various states. This quiz covers essential concepts regarding halogens in chemistry.
