An organic compound `A` is widely used as a preservative in pickles and has a molecular formula #C_2H_4O_2#. This compound reacts with ethanol to form a sweet smelling compound `B`?

1) WRITE THE FUNCTIONAL GROUP OF THE COMPOUND A
2) WRITE THE CHEMICAL EQUATION FOR THIS REACTION WITH ETHANOL TO FORM COMPOUND B
3) HOW CAN WE GET BACK THE COMPOUND AFROM B ?
4) NAME THE PROCESS AND WRITE CORRESPONDING CHEMICAL EQUATION

1) WRITE THE FUNCTIONAL GROUP OF THE COMPOUND A
2) WRITE THE CHEMICAL EQUATION FOR THIS REACTION WITH ETHANOL TO FORM COMPOUND B
3) HOW CAN WE GET BACK THE COMPOUND AFROM B ?
4) NAME THE PROCESS AND WRITE CORRESPONDING CHEMICAL EQUATION

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dk_ch Share
Mar 3, 2017

1) The functional group of the compound A of molecular formula #C_2H_4O_2#, widely used as a preservative in pickles is

-COOH

and the compound is ethanoic acid commonly known as acetic acid having structural formula #CH_3COOH#

2) The chemical equation for the reaction with ethanol #(CH_3CH_2OH) # is as follows. The sweet smelling compound B formed here is an ester named ethyl ethanoate and the reaction occurs in presence of conc. #H_2SO_4#

google

3)The Compound A can be reproduced from B by hydrolysis

4) The name of the process is hydrolysis . In this process B is heated with aqueous solution of #NaOHorKOH# and the ethanol produced escapes as volatile matter. As a result a solution of sodium ethanoate is obtained. This solution on heating with . #H_2SO_4# solution gives back the ethanoic acid.

Equations may be written as follows

#CH_3COOCH_2CH_3 +NaOH->CH_3COONa+CH_3CH_2OH#

#CH_3COONa+ H^+ ->CH_3COOH + Na^+ #

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