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Carboxylic Acids

An organic co...

Question

An organic compound (A) is widely used as a preservative in a pickle and has a molecular formula $C_{2} H_{4} O_{2}$ . This compound reacts with ethanol to form a sweet smelling compound (B).
(i) Identify the compounds A and B.
(ii) Name the process and write the corresponding chemical equation.

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Solution

Compound $C_{2} H_{4} O_{2}$ corresponds to Acetic acid or ethanoic acid $C H_{3} C O O H$ .
$O$
$C H_{3} - | | C - O H$
$⟶$ Vinegar is commercial name of acetic acid or ethanoic acid and is used as preservative in pickles.
$⟶$ Compound A is ethanoic acid with formula $C H_{3} C O O H$
$O$
$C H_{3} C O O H + C_{2} H_{5} O H (e t h a n o l) ⟶ C H_{3} - | | C - O - C_{2} H_{5} + H_{2} O$
Compound B is ethyl ethanoate. It is an ester.
The process of formation of an ester is called esterification.

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which is widely used as a preservative in pickles and has a molecular formula

C_{2} H_{4} O_{2}

. This compound reacts with ethanol to form a sweet-smelling compound

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