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In the laboratory this apparatus is used to crack long chain hydrocarbon molecules to form shorter chain hydrocarbon molecules - Edexcel - GCSE Chemistry - Question 2 - 2013 - Paper 1
Question 2
In the laboratory this apparatus is used to crack long chain hydrocarbon molecules to form shorter chain hydrocarbon molecules. When the experiment is complete ther... show full transcript
Worked Solution & Example Answer:In the laboratory this apparatus is used to crack long chain hydrocarbon molecules to form shorter chain hydrocarbon molecules - Edexcel - GCSE Chemistry - Question 2 - 2013 - Paper 1
Step 1
Step 2
Step 3
Describe what you would see in these tests.
Answer
When propane is bubbled through bromine water, there will be no change in color as propane is an alkane and does not react with bromine water. In contrast, when propene is bubbled through bromine water, the brown color of the bromine will fade due to the reaction with the alkene, indicating that propene is unsaturated.
Step 4
Explain why this process is important.
Answer
Cracking long chain hydrocarbons is important because shorter chain molecules are more useful for fuel and other applications. This process meets the demand for these shorter hydrocarbons and reduces the excess of long chain hydrocarbons. Additionally, cracking produces alkenes, which are essential for making polymers.