Chlorine reacts with potassium bromide in solution to form bromine and potassium chloride - Edexcel - GCSE Chemistry - Question 2 - 2015 - Paper 1
Question 2
Chlorine reacts with potassium bromide in solution to form bromine and potassium chloride.
(i) What type of reaction is taking place?
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Worked Solution & Example Answer:Chlorine reacts with potassium bromide in solution to form bromine and potassium chloride - Edexcel - GCSE Chemistry - Question 2 - 2015 - Paper 1
Step 1
What type of reaction is taking place?
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Answer
The reaction between chlorine and potassium bromide is a displacement reaction. In this type of reaction, a more reactive halogen displaces a less reactive halogen from its compound.
Step 2
State the colour of the mixture at the end of the reaction.
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Answer
At the end of the reaction, the mixture will turn orange due to the formation of bromine.
Step 3
Which is the most likely position of the element X in the periodic table?
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Answer
Element X is most likely a Group 1 element (alkali metal) or a Group 17 element (halogen). Given that solid chloride is dark red, element X is likely to be a halogen, positioned in Group 17.
