Chemical Properties and Interchange Between Homologous Series (5)

Chemistry

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Chemical Properties and Interchange Between Homologous Series (5)

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Five addition reactions that occur on alkenes (3)

Addition of halogen halide

Five addition reactions that occur on alkenes (4)

Addition of water (Hydration)

Five addition reactions that occur on alkenes (5)

Oxidation with acidified potassium manganate(VII), KMnO4 solution

Addition reactions that occur on alkenes - addition of hydrogen (hydrogenation)

Alkenes react with hydrogen at a temperature of 180 °C in the presence of nickel /platinum as a catalyst to produce the corresponding alkanes

Example of addition reactions that occur on alkenes - addition of hydrogen (hydrogenation)

Ethene gas, C2H4 reacts with hydrogen gas, H2 in the presence of nickel as a catalyst at 180 °C to produce ethane gas, C2H6

Addition reactions that occur on alkenes - addition of halogen (halogenation)

Alkenes react with halogens such as chlorine, Cl2 and bromine, Br2 at room conditions

Example of addition reactions that occur on alkenes - addition of halogen (halogenation)

For example, when ethene gas, C2H4 is bubbled through bromine water, Br2, the brown colour of bromine water, Br2 is decolourised

Addition reactions that occur on alkenes - addition of hydrogen halide

Alkenes react with hydrogen halides, such as hydrogen chloride, HCl or hydrogen bromide, HBr at room temperature to form haloalkane

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

For example, when dry hydrogen bromide gas, HBr is passed through ethene gas, C2H4, bromoethane is produced

Addition reactions that occur on alkenes - addition of water (hydration)

Alkenes react with water (in the form of steam) at high temperature and pressure, in the presence of phosphoric acid, H3PO4 as a catalyst to produce alcohol

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