Edexcel IGCSE Chemistry · Spec 4.23-4.28
Alkenes & the Bromine Water Test
The alkenes, their reactions, and the bromine water test for unsaturation.
Chemistry revision video
Alkenes & the Bromine Water Test
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Spec 4.23-4.28
What you need to know
- Describe the alkenes and their general formula
- Describe their addition reactions
- Use bromine water to test for a carbon-carbon double bond
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Quick check
Answer each question before opening the answer.
What is the general formula of the alkenes and what makes them unsaturated?
CnH2n; they contain a carbon–carbon double bond (C=C).
What is the result of the bromine water test with an alkene?
Bromine water is decolourised (orange to colourless); with an alkane it stays orange.
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