Photo AI
The diagram shows the structure of a molecule of ethene - Edexcel - GCSE Chemistry - Question 2 - 2012 - Paper 1
Question 2
The diagram shows the structure of a molecule of ethene. Ethene is unsaturated. Ethene is a hydrocarbon. Explain why ethene is described as an unsaturated hydrocar... show full transcript
Worked Solution & Example Answer:The diagram shows the structure of a molecule of ethene - Edexcel - GCSE Chemistry - Question 2 - 2012 - Paper 1
Step 1
Explain why ethene is described as an unsaturated hydrocarbon.
Answer
Ethene is considered an unsaturated hydrocarbon because it contains at least one double bond between carbon atoms. This double bond means that the molecule can potentially bond with more hydrogen atoms. In contrast, saturated hydrocarbons contain only single bonds and are fully bonded with hydrogen. This characteristic of ethene allows for additional reactions, distinguishing it from saturated hydrocarbons.
Step 2
Describe what you would see when a sample of ethene is shaken with bromine water.
Answer
When a sample of ethene is shaken with bromine water, you would observe a change in the color of the bromine water, which is initially orange-brown. The bromine water would become colorless due to the addition reaction, where bromine molecules add across the double bond of ethene, indicating that a chemical reaction has occurred.