take about 3 ml of ethanol in a test tube and warm it gently in a water bath
Add 5% solution of alkaline potassium permanganate drop by drop to the solution
does the colour of potassium permanganate persist when it is added initially ?
why does the colour of potassium permanganate not disappear when excess is added?
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Answer:
yes colour of the solution changes because it reacts with ethanol
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No, the colour initially disappear and when added in excess, it again reappears.
Explanation:
- The alkaline potassium permanganate is a very good oxidising agent.
- This is the Bayer's reagent.
- This reagent reacts with a substance oxidising it, and itself gets reduced to MnO2.
- The Manganese dioxide being colourless, gives no colour.
- So as initially the permanganate is added, the solution oxidised ethanol to ethanoic acid and itself got reduced to manganese dioxide.
- So, the solution became colourless.
- When excess is added, all the ethanol is already oxidised.
- So colour of reagent is seen again.
For more information about Bayer's reagent,
https://brainly.in/question/4308818
What is Baeyer's reagent? Give a test to distinguish between ethane ...
https://brainly.in/question/1479038
Baeyer's reagent is used in the laboratory for - Brainly.in
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