Aldehydes & Ketones

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  • Created by: J.E.C.
  • Created on: 09-04-14 15:16
What is a drug?
A substance that alters the way the body works.
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Carbonyl compounds consist of...?
Aldehydes & ketones
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How would you distinguish between an aldehyde and a ketone?
Add a few drops of the aldehyde or ketone to Fehling's solution and warm gently.
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What are the possible outcomes of the test with Fehling's solution?
An aldehyde: Blue --> Orange (red). Ketone: no colour change.
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Explain what happens when an aldehyde is added to Fehling's solution?
The aldehyde oxidises the copper(II) ions to copper (I) ions.
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What are the products of reduction of aldehydes and ketones? State if either can also be oxidised?
Aldehydes: Primary alcohols & can be oxidised to carboxylic acids. Ketones: Secondary alcohols, cannot be oxidised.
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All aldehydes and ketones undergo ___ ___ reactions with Hydrogen Cyanide in the presence of an alkali?
Nucleophilic Addition
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Hydrogen Cyanide is a ___ ___ acid and produces few ___ ions?
very weak, CNֿ
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A ___ is added to produce ___ ___ ions?
base, nucleophilic CNֿ ions
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Why is this reaction an example of nucleophilic addition?
The first step involves attack by a nucleophile.
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Card 2

Front

Carbonyl compounds consist of...?

Back

Aldehydes & ketones

Card 3

Front

How would you distinguish between an aldehyde and a ketone?

Back

Preview of the front of card 3

Card 4

Front

What are the possible outcomes of the test with Fehling's solution?

Back

Preview of the front of card 4

Card 5

Front

Explain what happens when an aldehyde is added to Fehling's solution?

Back

Preview of the front of card 5
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