Reaction of ethanal with acidified potassium permangante

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11 Terms

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Step 1

Acidify dilute potassium permanganate using the same amount of dilute sulfuric acid

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Step 2

Add ethanal to the acidified potassium permanganate

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Step 3

Stand the test tube in a beaker of hot water for a few minutes

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Step 4

Note observations

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What is observed in this experiment?

Colour change from purple to colourless

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Draw a diagram of the ethanal test tube observation

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Why was a colour change observed when ethanal was added?

Ethanal oxidised to ethanoic acid

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Step 5

Repeat experiment using propanone instead of ethanal

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Observation of experiment using propanone instead of ethanal

No colour change

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Why was there no colour change when propanone was used?

Ketones not easily oxidised

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Draw a diagram of the result of the experiment using propanone

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