This question is about cycloalkenes - AQA - GCSE Chemistry - Question 6 - 2021 - Paper 2
Question 6
This question is about cycloalkenes.
Cycloalkenes are ring-shaped hydrocarbon molecules containing a double carbon-carbon bond.
Cycloalkenes react in a similar way... show full transcript
Worked Solution & Example Answer:This question is about cycloalkenes - AQA - GCSE Chemistry - Question 6 - 2021 - Paper 2
Step 1
Describe a test for the double carbon-carbon bond in cycloalkene molecules.
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Answer
The test involves adding bromine water to the cycloalkene. The result is that the bromine water changes from brown/orange to colorless, indicating the presence of a double bond.
Step 2
Determine the general formula for cycloalkenes.
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Answer
The general formula for cycloalkenes can be determined as CₙH₂ₙ, where n is the number of carbon atoms.
Step 3
Complete Figure 7 to show the displayed structural formula of C₆H₁₀Cl₂.
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Answer
The displayed structural formula should correctly show two chlorine atoms attached to the cyclohexene structure, replacing two hydrogen atoms.
Step 4
Calculate the percentage by mass of chlorine in a molecule of C₆H₁₀Cl₂.
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