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Summary Unit 14 D- Applications of Organic Chemistry: Preparation of a compound with a carbonyl functional group (e.g. an aldehyde from an alcohol, an ester from a carboxylic acid). $13.64   Add to cart
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  7. Unit 14 - Applications of Organic Chemistry

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Summary Unit 14 D- Applications of Organic Chemistry: Preparation of a compound with a carbonyl functional group (e.g. an aldehyde from an alcohol, an ester from a carboxylic acid).

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  • Course
  • Unit 14 - Applications of Organic Chemistry
  • Institution
  • PEARSON (PEARSON)
  • Book
  • BTEC Level 3 National Applied Science, Student Book

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  • December 17, 2021
  • 4
  • 2021/2022
  • Summary

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  • organic chemistry
  • btec
  • applied science

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  • PEARSON (PEARSON)
  • Applied Science 2016 NQF
  • Unit 14 - Applications of Organic Chemistry
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Unit 14D Third experiment


Preparation of a compound with a carbonyl functional group (e.g. an aldehyde from an
alcohol, an ester from a carboxylic acid).

Aim: To prepare ethanal from ethanol.
Introduction: Ethanol can undergo oxidation by the dichromate (VI) ion in acidic solution. The
first product of oxidation is ethanal, which can be further oxidised to form ethanoic acid.
Changing the reaction method can lead to one or the other product being obtained.
Reactants and reagents; Ethanol, oxygen, sodium dichromate, concentrated sulfuric acid.
Predicted products; Ethanal, ethanoic acid, water.
Apparatus and quantities used; 50cm3 of deionised water, round bottom flask, 17 cm3 of
concentrated sulphuric acid, anti-bumping granules, 50 grams of sodium dichromate (VI), 40
cm3 ethanol, dropping funnel, reflux apparatus.

Method:


1. I added 50cm3 of deionised water into a round bottom flask and then slowly added 17
cm3 of concentrated sulphuric acid, whilst shaking.
2. I then added some anti-bumping granules to the flask and set up the apparatus shown
as demonstrated below;




3. I then dissolved 50 grams of sodium dichromate (VI) into the 50 cm3 of deionised water and
then added 40 cm3 ethanol.

4. I ensured the contents was mixed well and added the mixture to the dropping funnel in the
above apparatus, ensuring the tap was closed first.

5. I then heated the acid in the flask to a gentle boil and turned off the heat.




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