CHEM - Properties and Reactions of Halogens
Chemistry, halogen, reaction - IGCSE | IBDP | DSE | GCE | AP Chemistry
Properties and Trends of Halogens
For IGCSE Chemistry, you should be able to predict the colour and state of halogens based on the trend.
Displacement Reactions Involving Halogens and Halides
A more reactive halogen displaces a less reactive halogen from a solution of its halide.
Let's take a look at a IGCSE Chemistry question! 😁
Each of the halides were dissolved in water to form a solution, and a sample of each of the halogens was added to the halide solution.
(a) Why was there no reason to add chlorine to lithium chloride?
No displacement reaction will take place.
(b) Why was there no reaction when iodine was added to sodium bromide solution?
Iodine is less reactive than bromine, so there is no displacement reaction.
(c) Name the substance with the brown colour that formed when chlorine was added to potassium iodide solution.
(d) Which halogen displaces which halogen in the reaction between bromine and potassium iodide solution?
Bromine displaces iodine.
(e) Write the chemical equation for the reaction between chlorine and potassium bromide solution.
Cl2 + 2KBr → Br2 + 2KCl
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