Alcohol reactions

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  • Created by: Zohar
  • Created on: 15-03-15 20:40
Alcohol combustion reaction produces..
CO2 and H2O
1 of 10
First oxidation of a primary alcohol
heat with potassium dichromate (K2Cr2O7) and H2SO4: turns from orange to green + produces H2O + aldehyde eg ethanal CH3CHO
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second oxidation of primary alcohol
heat under reflux with K2Cr2O7 and H2SO4 produces carboxylic acid + H2O eg ethanoic acid CH3COOH
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oxidation of secondary alcohol
heat under reflux with K2Cr2O7 and H2SO4 produces ketone eg propanone CH3COCH3
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reaction of alcohol(C2H5OH) with sodium
produces 0.5H2 + sodium ethoxide C2H5O-Na+
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test for an OH group (on CH3OH)/halogenation
add PCl5 -> CH3Cl + POCl3 + HCl (test steamy fumes with damp blue litmus turns red)
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what colour are tertiary alcohols under oxidising agents
Stay orange, dont react
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alcohol bromination reaction when heated under reflux with KBr and 50%H2SO4
KBr + H2SO4 -> KHSO4 + HBr then CH3CH2OH + HBr -> CH3CH2Br + H2O
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Iodination when alcohol warmed with iodine
2P (moist red) + 3I2 -> 2PI3 then 3CH3CH2OH + PI3 -> 3CH3CH2I + H3PO3
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What is the melting/boiling point of alcohols?
higher than alkanes bc H bonding, not just London forces
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Other cards in this set

Card 2

Front

First oxidation of a primary alcohol

Back

heat with potassium dichromate (K2Cr2O7) and H2SO4: turns from orange to green + produces H2O + aldehyde eg ethanal CH3CHO

Card 3

Front

second oxidation of primary alcohol

Back

Preview of the front of card 3

Card 4

Front

oxidation of secondary alcohol

Back

Preview of the front of card 4

Card 5

Front

reaction of alcohol(C2H5OH) with sodium

Back

Preview of the front of card 5
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