Why does the colour of potassium permanganate not disappear when excess is added in ethanol?
Answers
Explanation:
Initially colour disappears because colouredpermanganate ions of potassium permanganate are consumed to oxidiseethanol. When excess is added colour does not change because there is nomore alcohol left and hence there is noreaction.
Answer: The colour first vanishes when KMnO4 is introduced because ethanol is oxidised by coloured permanganate ions of potassium permanganate. Since there is no longer any alcohol available for the reaction, adding too much KMnO4 causes no change in colour.
Explanation:
Initial addition of alkaline potassium permanganate to an ethanol solution results in the disappearance of the purple colour of the compound. This is due to the alkaline potassium permanganate's consumption of the coloured permanganate ions necessary for the oxidation of ethanol solution.
The colour of alkaline potassium permanganate, which is purple, remains unchanged when an excess of the compound is added. This is due to the fact that there is no ethanol remaining for the reaction.
Alkaline potassium permanganate reacts with an ethanol solution using the following chemical equation:
C2H5OH −−−−−−−−−−−−−> CH3COOH
Reagents are Alkaline KMnO4+Heat.
Hence, the colour of potassium permanganate does not disappear when excess is added to ethanol because no alcohol remains for the reaction.
To know more about alcohol from the given link
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