Question

# A liquid was mixed with ethanol and a drop of concentrated ${\mathrm{H}}_{2}{\mathrm{SO}}_{4}$​ was added. A compound with a fruity smell was formed. The liquid was .

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Solution

## The liquid that was mixed with ethanol was acetic acid. Acetic acid is an organic acid. Its chemical name is Ethanoic acid and its chemical formula is ${\mathrm{CH}}_{3}\mathrm{COOH}$.When a carboxylic acid and an alcohol react in the presence of conc. ${\mathrm{H}}_{2}{\mathrm{SO}}_{4}$ , an ester is formed and this reaction is called an esterification reaction. Ester is a sweet-smelling organic compound and used for various purposes like in perfumes and room fresheners. $\mathrm{Ethanoic}\mathrm{acid}+\mathrm{Ethanol}\stackrel{{\mathrm{H}}_{2}{\mathrm{SO}}_{4}}{\to }\mathrm{Ethylacetate}+\mathrm{Water}\phantom{\rule{0ex}{0ex}}\left(\mathrm{ester}\right)\phantom{\rule{0ex}{0ex}}{\mathrm{CH}}_{3}\mathrm{COOH}\left(\mathrm{l}\right)+{\mathrm{C}}_{2}{\mathrm{H}}_{5}\mathrm{OH}\left(\mathrm{l}\right)\stackrel{{\mathrm{H}}_{2}{\mathrm{SO}}_{4}}{\to }{\mathrm{CH}}_{3}{\mathrm{COOC}}_{2}{\mathrm{H}}_{5}\left(\mathrm{l}\right)+{\mathrm{H}}_{2}\mathrm{O}\left(\mathrm{l}\right)$

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