Distinguish between esterification and saponification reactions of organic compounds with the help of the chemical equation for each. What is the use of (i) esters and (ii) saponification process?
Distinguish between esterification and saponification reactions of organic compounds with the help of the chemical equation for each. What is the use of (i) esters and (ii) saponification process?
Distinction between Esterification and Saponification
| Feature | Esterification | Saponification |
|---|---|---|
| Definition | The reaction of a carboxylic acid with an alcohol in the presence of an acid catalyst to form a sweet-smelling ester. | The reaction of an ester with an alkali (base) to yield back the alcohol and the sodium salt of the carboxylic acid (soap). |
| Reactants | Carboxylic acid + Alcohol | Ester + Strong Base (e.g., ) |
| Products | Ester + Water | Sodium salt of carboxylic acid (Soap) + Alcohol |
Chemical Equations
- Esterification Reaction:
(Ethanoic acid + Ethanol Ethyl ethanoate + Water)
- Saponification Reaction:
(Ethyl ethanoate + Sodium hydroxide Sodium acetate + Ethanol)
Uses
- Use of Esters: Esters are sweet-smelling substances used in making perfumes, synthetic flavorings, cosmetics, and as industrial solvents.
- Use of Saponification Process: This process is primarily used in the commercial preparation and manufacturing of soaps.
Marking Scheme
- 1Correct distinction between esterification and saponification with definitions (1 mark)
- 2Balanced chemical equation for esterification (0.5 marks)
- 3Balanced chemical equation for saponification (0.5 marks)
- 4Stating the use of esters (perfumes/flavoring agents) (0.5 marks)
- 5Stating the use of saponification (soap preparation) (0.5 marks)
Hint
Esterification forms a sweet-smelling ester using an acid catalyst, while saponification uses a base to break down the ester into soap and alcohol.
Quick Oral Answer
Esterification is the reaction of an alcohol with a carboxylic acid to form a sweet-smelling ester. Saponification is the alkaline hydrolysis of an ester to produce soap and alcohol.
Analysis & Explanation
Esterification is a condensation reaction where an ester is synthesized from an organic acid and an alcohol, catalyzed by mineral acids. Saponification is essentially the reverse process (hydrolysis of an ester under basic conditions), which breaks down the ester linkage to produce soap (sodium/potassium salt of fatty acid) and alcohol.
Common Mistakes
- 1Writing the saponification equation without a base like .
- 2Confusing the products of the two reactions.
Interesting Facts
Saponification gets its name from the Latin word 'sapo', which means soap. Historically, soap was made by boiling animal fats with ashes containing potassium carbonate.
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Frequently Asked Questions
How many marks does this question carry in CBSE Class 10 Science 2012?
This question carries 3 marks in the CBSE Class 10 Science 2012 examination.
Which chapter does this question come from in Science?
This question is from the chapter "Carbon and its Compounds" in the CBSE Class 10 Science syllabus.
What topic does this question cover in Science?
This question covers the topic "Chemical Properties of Carbon Compounds" from CBSE Class 10 Science.
What type of question is this in the CBSE Class 10 Science 2012 paper?
This is a Short Answer question from Section A in the CBSE Class 10 Science 2012 paper.