CBSE Class 10 Science 2017 Outside Delhi Term II Set 2 Paper

Question : 8 of 12

Marks: +1, -0

Explain esterification reaction with the help of a chemical equation. Describe an activity to show esterification.

Solution:

The reaction of carboxylic acid with alcohol forms an ester. This process of formation of ester is called esterification.

{\CH}_3 {\COOH}\;+ {\CH}_3 {\CH}_2 {\OH} \;→ {\CH}_3 {\COOCH}_2 {\CH}_3+ {\H}_2 {\O}

Activity :
(i) Take

1 {\ml}

of ethanol and

1 {\ml}

of glacial acetic acid in a boiling tube and mix the contents well.
(ii) Add few drops of conc.

{\H}_2 {\SO}_4

to it.
(iii) Warm the contents on a water bath for a few minutes.
(iv) Now pour the solution in a beaker containing

20-50 {\mL}

of water.
(v) A sweet fruity smell indicating formation of an ester is observed.

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