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Summary AQA AS Level Chemistry - Organic Chemistry: Alcohols Full Notes (Unit 3.3.5) $3.89   Add to cart
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Summary AQA AS Level Chemistry - Organic Chemistry: Alcohols Full Notes (Unit 3.3.5)

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  • Unit 3.3.1-6 (7404)
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  • AQA

Detailed and comprehensive notes covering the alcohols sub-topic of AQA AS organic chemistry (unit 3.3.5). This includes: alcohol classification, elimination (dehydration) of alcohols, hydration of ethene (electrophilic addition), fermentation of glucose, bioethanol and oxidation of alcohols. Mech...

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  • June 12, 2023
  • 5
  • 2021/2022
  • Summary

Subjects

  • aqa
  • aqa chemistry
  • as level
  • as level chemistry
  • chemistry
  • chem
  • aqa chemistry as level
  • organic
  • organic chemistry
  • as organic chemistry
  • organic chemistry notes
  • alkanes
  • hal
  • introduction to organic chemistry

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  • A/AS Level
  • AQA
  • A Level Chemistry
  • Unit 3.3.1-6 (7404)
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Alcohols
Classification
• General Formula: CnH2n+1OH
• Functional Group: -OH

Isomerism
• Position isomers have the –OH group attached at different positions in the carbon chain.
• Results in different classes of alcohols (1°, 2° & 3°) depending on the number of carbon atoms attached to the
carbon bound to –OH.

Nomenclature
• Suffix: -ol
• If an alcohol contains multiple –OH groups, you use the suffix –diol, -triol, etc.
• Keep the e in the alkane parent in the name, e.g. propane-1,2,3-triol.

Classes of Alcohol




Elimination Reaction – Dehydration of Alcohols

• Ethanol can be dehydrated to give ethane by heating with an excess of concentrated sulfuric acid at 170°C.
• This reaction allows you to produce alkenes from renewable resources (without using oil).




Lone pair on oxygen donates
electron to H+ ion, forming a bond.




Oxygen forms 3 bonds, so has 1+
charge.




Forms an alkene, water and H+ is
regenerated.



Dehydration of more complex alcohols can give more than one possible product, as the double bond can form either
side of the carbon atom with the –OH group attached.
19

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