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Give an example of an oxidising agent used in the oxidation of alcohol to form carboxylic acid under reflux.

Question

Give an example of an oxidising agent used in the oxidation of alcohol to form carboxylic acid under reflux.

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Solution

An example of an oxidising agent used in the oxidation of alcohol to form carboxylic acid under reflux is Potassium Dichromate (K2Cr2O7) in the presence of dilute sulfuric acid (H2SO4).

Here are the steps:

  1. The alcohol is heated under reflux with an excess of the oxidising agent, potassium dichromate (K2Cr2O7) in dilute sulfuric acid (H2SO4).

  2. The reflux condenser is used to prevent the loss of the alcohol and carboxylic acid by evaporation.

  3. The reaction mixture is heated to ensure that the reaction goes to completion.

  4. The orange solution of potassium dichromate (VI) turns green due to the formation of chromium (III) ions.

  5. The alcohol is oxidised to a carboxylic acid.

  6. The carboxylic acid can then be distilled off and collected.

This is a common method used in the laboratory to oxidise alcohols to carboxylic acids.

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