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Formulae, functional groups and terminology
Create and analyze the displayed formula of a molecule to illustrate all atoms and bonds present.
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90 min
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CambridgeIGCSEChemistryOrganic chemistry
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Formulae, functional groups and terminology outcomes9 objectives
- Create and analyze the displayed formula of a molecule to illustrate all atoms and bonds present.
- Write and understand the general formulae for compounds within the same homologous series, specifically: (a) alkanes, CnH2n+2 (b) alkenes, CnH2n (c) alcohols, CnH2n+1OH (d) carboxylic acids, CnH2n+1COOH.
- Recognize a functional group as an atom or group of atoms that defines the chemical characteristics of a homologous series.
- Explain that a homologous series consists of a group of similar compounds that share similar chemical properties due to having the same functional group.
- Clarify that a saturated compound contains molecules where all carbon-carbon bonds are single bonds.
- Clarify that an unsaturated compound contains molecules with one or more carbon-carbon bonds that are not single bonds.
- Explain that a structural formula provides a clear description of how the atoms in a molecule are arranged, including examples like CH2=CH2, CH3CH2OH, and CH3COOCH3.
- Define structural isomers as compounds that have the same molecular formula but different structural formulas, with examples such as C4H10 and C4H8.
- Outline the general features of a homologous series, which include: (a) sharing the same functional group (b) having the same general formula (c) differing by a -CH2- unit between members (d) showing a trend in physical properties (e) exhibiting similar chemical properties.
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