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13. Acid-catalyzed dehydration-condensation reactions of carboxylic acids and alcohols produce chemicals called
esters.
i. Using carbon skeletal notation, write the dehydration-condensation reaction that occurs between ethanol
and butanoic acid.
ii. What is the name of this ester?

Respuesta :

Answer:

A condensation reaction joins two larger molecules by splitting out a smaller molecule — usually water or ammonia — between them.

In an esterification reaction, an OH  from the acid and an H from the alcohol form a molecule of water.

The larger parts join to form the ester.

Ethanol and butanoic acid react to form ethyl butanoate.

Acid-catalyzed dehydration-condensation reactions of carboxylic acids and alcohols produce chemicals called "esters". The dehydration-condensation reaction occurs between 'ethanol' and 'butanoic acid' giving an ester called as "ethyl butanoate".

What is an ester and how it is formed?

  • Esters are produced when carboxylic acids are heated with alcohols in the presence of an acid catalyst.
  • The catalyst is usually concentrated sulphuric acid.
  • Dry hydrogen chloride gas is used in some cases, but these tend to involve aromatic esters (ones containing a benzene ring).
  • Esters are represented by the formula RCOOR', where R and R' are hydrocarbon groups.
  • The chemical reaction occurring in the formation of the ester is known as an esterification reaction.

The reaction that occurs between ethanol and butanoic acid:

Ethanol reacts with butanoic acid in the presence of an acid-catalyst and gives ethyl butanoate as ester and water as products. If an acid reacts with a base, salt and water are the products. But ester is not a salt.

i) The carbon skeletal notation for the given reaction is shown below.

ii) The ester is named "ethyl butanoate".

Learn more about esterification here:

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