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The structure of a molecule of propene is H H \ / C=C / \ H CH₃ (a) Propene is an unsaturated hydrocarbon - Edexcel - GCSE Chemistry - Question 2 - 2015 - Paper 1
Question 2
The structure of a molecule of propene is H H \ / C=C / \ H CH₃ (a) Propene is an unsaturated hydrocarbon. (i) Explain what is meant b... show full transcript
Worked Solution & Example Answer:The structure of a molecule of propene is H H \ / C=C / \ H CH₃ (a) Propene is an unsaturated hydrocarbon - Edexcel - GCSE Chemistry - Question 2 - 2015 - Paper 1
Step 1
Explain what is meant by unsaturated hydrocarbon.
Answer
An unsaturated hydrocarbon is a compound that contains only hydrogen and carbon atoms, and features at least one double or multiple bond between carbon atoms. This means that the carbon atoms are not bonded to the maximum number of other atoms, which allows for the potential to react with more atoms or molecules.
Step 2
Step 3
Describe what is seen when a sample of propene is shaken with bromine water.
Answer
When a sample of propene is shaken with bromine water, the reddish-brown color of bromine water will disappear, indicating that a reaction has occurred. This is due to the bromine reacting with the double bond in the propene molecule, resulting in the formation of a colorless compound.