Question

What happen when 5% alkaline KMNO4 solution is added drop by drop to warm ethanol taken in a test tube. State the role of alkaline KMNO4 solution in this reaction.

Answer 1

C2H5OH-----KMNO4------>CH3COOH ethanoic acid is formed. KMO4 is oxidizing agent.

Answer 2

It oxidises ethanol to ethanoic acid.

Explanation:

5% alkaline $KMnO_4$ is a deep purple colour solution. It is a strong oxidizing agent and used to oxidize other solutions and it is also used in identification of many other compounds.

In this case 5% alkaline $KMnO_4$ solution is added drop by drop to warm ethanol, and due to its strong oxidizing property it oxidizes ethanol to ethanoic acid and it colour changes to brown due to the formation of $MnO_2$.

Chemical reaction is :

$KMnO_4(alk)+C_2H_5OH-->CH_3COOH+MnO_2$.

Learn More :

Preparation of $KMnO_4$.

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