Alkenes

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  • Created by: 3mily05
  • Created on: 13-01-20 17:45
Alkenes:
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General Formula
CnH2n
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Ethene
C2H4
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Propene
C3H6
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Butene
C4H8
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Pentene
C5H10
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Reactions of Alkenes:
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Oxidation (incomplete combustion), Observation
Burn in air to produce smoky flames
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Addition reactions e.g. Hydrogenation Hydration, Observation
Double bond opens to form single bonds. Reacts with hydrogen to make alkanes. Reacts with water to make alcohols. Reacts with halogens to make halogenoalkanes.
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Fermentation of Alcohols Equation, symbol:
C6H12O6 → 2 C2H5OH + 2 CO
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Fermentation of Alcohols Equation, word:
glucose → ethanol + carbon dioxide
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Making Alcohols by hydration of alkenes
C2H4 + H2O ------------→ C2H5OH
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Alcohols:
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Uses of alcohols
Solvent in perfumes, Disinfectant in hand gels, Fuel for cars (biofuel – fuel from plants)
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Properties of Alcohols
Dissolve in water, pH 7
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Reaction with sodium
Less reactive than with water but hydrogen is formed (bubbles), Metal skates around surface
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Reaction with oxygen
Complete combustion
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Oxidation
Oxidising agent changes colour and a carboxylic acid is made
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Functional Group
-OH
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Methanol
CH3OH
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Ethanol
C2H5OH
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Propanol
C3H7OH
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Butanol
C4H9OH
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Other cards in this set

Card 2

Front

General Formula

Back

CnH2n

Card 3

Front

Ethene

Back

Preview of the front of card 3

Card 4

Front

Propene

Back

Preview of the front of card 4

Card 5

Front

Butene

Back

Preview of the front of card 5
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