Which mixture would react by displacement?
Answer and explanation
Correct answer: B. bromine water with potassium iodide solution
- Step 1: Reactivity of the halogens falls down the group: .
- Step 2: A more reactive halogen displaces a less reactive one from its salt.
- Step 3: Bromine can displace iodine: .
Answer
bromine water with potassium iodide solution.
Why not the others: iodine solution with potassium bromide solution: iodine is less reactive than bromine and cannot displace it. bromine water with potassium chloride solution: bromine is less reactive than chlorine and cannot displace it. iodine solution with potassium chloride solution: iodine is less reactive than chlorine and cannot displace it.
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