Alcohols & Ethers

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  • Created by: J.E.C.
  • Created on: 11-04-14 11:18
What functional group do all ethers contain?
-OR (alkoxy)
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Isomeric alcohols are possible for alcohols containing more than __ Carbons?
2
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What are alcohols containing more than one OH group called?
polyhydric
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Alcohol molecules are polar because of the polarised ___ bond?
O-H
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In terms of hydrogen bonding, what would the partial charge be on the oxygens and hydrogens?
O: - H:+
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Why are the boiling points of alcohols higher than those of corresponding alkanes with similar RAM?
Strong hydrogen bonds hold the molecules together - more energy required to break these bonds for the liquid to become a gas.
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Give the position of the OH group in primary alcohols?
At the end of the chain
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Give the position of the OH group in secondary alcohols?
In the middle of the chain
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Give the position of the OH group in tertiary alcohols?
Attached to a Carbon atom which carries no H atoms.
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Alcohols are usually oxidised by heating with....?
acidified solution of potassium dichromate
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What colour change would you observe?
Orange > Green
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Oxidation of the OH group will only occur if...?
there is a H atom attached to the C atom to which the OH is attached
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In oxidation of an alcohol, two Hydrogen's are removed, one from the ___ atom and one from the ___ atom?
oxygen, carbon
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Primary alcohols oxidise to...?
aldehydes (can be distilled out) - then oxidised to a carboxylic acid
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Secondary alcohols oxidise to...?
ketones
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Many alcohols can lose ___ to form an alkene?
A molecule of water
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Alcohols can be dehydrated by heating with...?
Concentrated sulphuric acid
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Dehydration is an example of an elimination reaction, define elimination reaction?
Reaction in which a small molecule is removed from a larger molecule, leaving am unsaturated molecule.
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How would you name an ether?
Smallest alkane chain first (eth) then oxy then longest alkane chain (ethane) e.g. ethoxyethane
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Ether molecules are slightly ___ and the attractive forces between molecules are ___?
polar, relatively weak
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Ethers cannot H bond because...?
There are no H atoms attached to the oxygen
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Ethers are slightly soluble in water but mix well with...?
Other non-polar molecules (eg alkanes)
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Card 2

Front

Isomeric alcohols are possible for alcohols containing more than __ Carbons?

Back

2

Card 3

Front

What are alcohols containing more than one OH group called?

Back

Preview of the front of card 3

Card 4

Front

Alcohol molecules are polar because of the polarised ___ bond?

Back

Preview of the front of card 4

Card 5

Front

In terms of hydrogen bonding, what would the partial charge be on the oxygens and hydrogens?

Back

Preview of the front of card 5
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