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Ethene, C₂H₄, reacts with bromine, Br₂, in an addition reaction - OCR Gateway - GCSE Chemistry - Question 12 - 2020 - Paper 1

Question 12

Ethene, C₂H₄, reacts with bromine, Br₂, in an addition reaction. Which is the balanced symbol equation for this reaction? A C₂H₄ + Br₂ → C₂H₃Br + HBr B C₂H₄ + Br₂ ... show full transcript

Worked Solution & Example Answer:Ethene, C₂H₄, reacts with bromine, Br₂, in an addition reaction - OCR Gateway - GCSE Chemistry - Question 12 - 2020 - Paper 1

Step 1

C₂H₄ + Br₂ → C₂H₄Br₂

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Answer

In this reaction, ethene (C₂H₄) reacts with bromine (Br₂) to form dibromoethane (C₂H₄Br₂) through an addition reaction. Since ethene has a double bond, it reacts with bromine, breaking the double bond and allowing the addition of bromine atoms across the former double bond, resulting in a saturated compound. Thus, the balanced equation is:

$C₂H₄ + Br₂ → C₂H₄Br₂$

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