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Transcript
CHEMISTRY 3.5
WORKSHEET FOUR
ANSWERS
ORGANIC
Alcohols continued
1.
The reaction product is a haloalkanes which is insoluble in the mixture and so
forms a cloud of tiny droplets.
2.
Acidified permanganate (or acidified dichromate)
aldehydes
carboxylic acids
ketones
Tertiary
3.
No Product
CH3COCH3 (propanone)
CH3CH2CH2CHO (butanal)
No Product
CH3CH2COCH3 (butan-2-one)
CH3COCH2CH2CH2CH3
(hexan-2-one)
CH3CH2CH2COOH (butanoic acid)
4.
In order to oxidise a tertiary alcohol a carbon-carbon bond would have to be
broken and this does not take place.
5.
(a)
(b)
6.
(a)
(b)
(c)
(d)
(e)
(f)
A milder oxidising agent is used, such as acidified dichromate, and the
aldehyde is distilled off as soon as it is made.
In order to make a carboxylic acid, the reaction is done under reflux so
the aldehyde can be further oxidised.
CH3CH=CH2
CH3CH2CH2Cl
Conc H2SO4
PCl5 / PCl3 / HCl, ZnCl2
CH3CH2CHO
H+/Cr2O72-