Testing for compounds

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Testing for an aldehyde or Ketone?
2,4-DNPH will give an orange precipitate with an aldehyde or ketone presence.
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Testing for an aldehyde?
Either Tollens which will give a silver mirror, or Fehling's which will give a red-brown precipitate when added to an aldehyde. If excess aldehyde is added acidified dichromate will go from orange to green.
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Testing for a methyl Ketone?
The iodoform test will give a positive result, a yellow precipitate of triodomethane.
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Testing for an acid?
Add sodium carbonate, if an acid is present bubbles of carbon dioxide gas will be let of.
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Testing for a phenol?
Add Iron (III) chloride, this will give a purple solution if a phenol is present.
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Testing for unsaturation?
Add bromine water, if unsaturated it will go from brown to colourless.
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Other cards in this set

Card 2

Front

Testing for an aldehyde?

Back

Either Tollens which will give a silver mirror, or Fehling's which will give a red-brown precipitate when added to an aldehyde. If excess aldehyde is added acidified dichromate will go from orange to green.

Card 3

Front

Testing for a methyl Ketone?

Back

Preview of the front of card 3

Card 4

Front

Testing for an acid?

Back

Preview of the front of card 4

Card 5

Front

Testing for a phenol?

Back

Preview of the front of card 5
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