Learning objective
State the general formula for the homologous series of alkenes as CnH2n.
Read the explanation, check the common trap, then practise with flashcards and questions.
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Topic
Reactions of alkenes and alcohols (chemistry only)
Subtopic
Structure and formulae of alkenes
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Quick explanation
State the general formula for the homologous series of alkenes as CnH2n
- This point belongs to Reactions of alkenes and alcohols (chemistry only), especially Structure and formulae of alkenes.
- You need to be able to state the general formula for the homologous series of alkenes as CnH2n.
- The key ideas to know are homologous series and alkene.
- Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.
Key concepts
Why it matters
This objective helps connect Structure and formulae of alkenes to exam-style questions, flashcards, and revision notes for Reactions of alkenes and alcohols (chemistry only).
Quick student answer
What should you know about general formula for the homologous series of alkenes as CnH2n?
Direct answer
In Chemistry, this page helps you answer questions about general formula for the homologous series of alkenes as CnH2n within Reactions of alkenes and alcohols (chemistry only). Focus on the key process, correct scientific terms, and how the idea links to exam-style questions. Key terms to check are alkene and homologous series.
Key terms
- alkene: A hydrocarbon that contains a carbon-carbon double bond.
- homologous series: A group of compounds with the same functional group and similar chemical properties, differing by a constant unit.
Common trap
Confusing Alkene Formula: Remember that alkenes are unsaturated hydrocarbons with a double bond, which means they have two fewer hydrogen atoms than alkanes, leading to the correct formula CnH2n.
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Revision notestopic notes
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Open revision notesRelated learning objectives
- Describe alkenes as hydrocarbons with a double carbon-carbon bond.
Structure and formulae of alkenes
- Explain that alkenes are unsaturated because they contain two fewer hydrogen atoms than the alkane with the same number of carbon atoms.
Structure and formulae of alkenes
- Recall the first four members of the homologous series of alkenes as ethene, propene, butene and pentene.
Structure and formulae of alkenes
- Represent alkene molecules in displayed, structural and molecular formula forms.
Structure and formulae of alkenes
- Recognise alkenes from their names or from given formulae.
Structure and formulae of alkenes