Chemical Properties and Interchange Between Homologous Series (6)

Chemistry

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Chemical Properties and Interchange Between Homologous Series (6)

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Example of addition reactions that occur on alkenes - addition of hydrogen halide

For example, ethene gas, C2H4 undergoes an addition reaction with steam at the temperature of 300 °C, pressure of 60 atm and catalysed by phosphoric acid, H3PO4 to produce ethanol, C2H5OH

Addition reactions that occur on alkenes - oxidation with acidified potassium manganate(VII), KMnO4 solution (1)

Alkenes react with acidified potassium manganate(VII), KMnO4 solution

Addition reactions that occur on alkenes - oxidation with acidified potassium manganate(VII), KMnO4 solution (2)

In this reaction, two hydroxyl groups OH are added to the double bond

Addition reactions that occur on alkenes - oxidation with acidified potassium manganate(VII), KMnO4 solution (3)

Alkenes decolourise the purple colour of acidified potassium manganate(VII), KMnO4 solution

Addition polymerisation reaction of alkene (1)

Small alkene molecules undergo addition reaction with one another to form long chain molecules

Addition polymerisation reaction of alkene (2)

Alkene molecules link together to form a long chain of molecules called polymer, while the smaller alkene molecules are the basic units called monomers

Addition polymerisation reaction of alkene (3)

The reaction of alkene monomers to form polymers is called addition polymerisation

Example of addition polymerisation reaction of alkene (1)

Ethene, C2H4 undergoes addition polymerisation at 200 °C and pressure of 1200 atm to produce polythene

Similarities between alkane and alkene (1)

Are hydrocarbons containing only the carbon and hydrogen elements

Similarities between alkane and alkene (2)

Complete combustion produces carbon dioxide, CO2 and water, H2O

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Chemical Properties and Interchange Between Homologous Series (6)

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