What is esters? how are esters prepared? write the chemical for the reaction involved? what happens when an esters reacts with sodium hydroxide? write the chemical equation for the reaction and also state the name and use of this reaction?
Answers
What is esters?
=> Ester is an organic compound in the field of chemistry , which is produced by the reaction of acid with alcohols.
It is denoted by R - (OR')C=O
where R and R' are alkyl groups.
how are esters prepared? write the chemical for the reaction involved?
=> Esters can be prepared with many reactions but mostly used and preferred reaction is the reaction of carboxylic Acid with alcohol with results in formation of ester and water molecule.
The yield can be improved using a little of suphuric acid as the catalyst will increase the rate . The process of forming ester is called esterification.
R-CO²-H + HO-R' == R-CO² -R + H²O
what happens when an esters reacts with sodium hydroxide? write the chemical equation for the reaction and also state the name and use of this reaction?
When ester reacts with Sodium hydroxide , the corresponding products formed will be carboxylic acid of sodium salt and a alcohol group.
R-CO²-R' + NaOH ==> R-CO²-Na + R'-OH
This process is called saponification.
The name is due to reason because this is used in preparation of soap
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Some esters can be prepared by esterification, a reaction in which a carboxylic acid and an alcohol, heated in the presence of a mineral acid catalyst.In this process, carboxylic acid is mixed with alcohol so as to get ester in the presence of an acid. This is an acid catalysed reaction and is also reversible.So, esters are formed when ethanol (CH3CH2OH) with ethanoic acid (CH3COOH) in the presence of acid as catalyst (H2SO4).
The chemical reaction invovled in the preparation of esters known as esterification is : -
CH3CH2OH + CH3COOH
When ester react with Sodium Hydroxide it formed Glycerol(Ethanol) and a Sodium Salt of Carboxylic Acid (Sodium Ethanoate) .
Reaction is as follows :-
CH3COOC2H5 + NaOH ------------> CH3COONa + CH3CH2OH
This reaction is known as Saponification .
Saponification reaction is used in the preparation of Soaps.
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