8: Esters can be prepared by using as an starting material
an amine and an acid
an alkane and a ketone
a ketone and an alcohol
an acid and an alcohol
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Esters can be prepared by using an acid and an alcohol as starting material
Explanation:
Ester is the chemical ethyl ethanoate CH3COOC2H5. It is a compound derived from an acid in which at least one –OH group is replaced by an –O–alkyl group. Usually, esters are derived from a carboxylic acid and an alcohol through a process called esterification.
When alcohol reacts with carboxylic acid in presence of an acid catalyst and heat, we get ester and water. This reaction is a reversible reaction. It is a condensation reaction and so water molecules are eliminated during the reaction.
Structural formula of acid is RCOOH where R is a monovalent and COOH is the carboxyl group.
Example:
CH3COOH + CH3CH2OH --> CH3COOCH2CH3 + H2O
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♦ An Acid and An Alcohol ♦
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