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Question
Distinguish between esterfication and saponification reaction with the help of the chemical equations for each.
Solution
Esterification reaction is opposite/reverse of saponification reaction.
In esterification, a carboxylic acid and an alcohol react to form ester in presence of acid.
RCOOH + R′OH →H+ RCOOR′ + H2O
Whereas, in saponification reaction an ester reacts with a strong base or an acid to give alcohol and carboxylic acid.
RCOOR′ + NaOH → RCOONa + R′OH
RELATED QUESTIONS
Why do soaps not form lather in hard water?
A student takes about 4 ml of distilled water in four test tubes marked P, Q, R and S. He then dissolves in each test tube an equal amount of one salt in one test tube, namely sodium sulphate in P, potassium sulphate in Q, calcium sulphate in R and magnesium sulphate in S. After that he adds an equal amount of soap solution in each test tube. On shaking each of these test tubes well, he observes a good amount of lather (foam) in the test tube marked
(A) P and Q
(B) Q and R
(C) P, Q and S
(D) P, R and S
Why have detergents replaced soap as a washing agent?
Which of the two is better for washing clothes when the water is hard: soap or detergent? Give reason for your answer.
What is saponification? Write the chemical equation of the reaction involved in this process. Name all the substances which take part in this process and also those which are formed.
What is a soap? Name one soap.
What are detergents chemically? List two merits and two demerits of using detergents for cleansing. State the reason for the suitability of detergents for washing, event in the case of water having calcium and magnesium ions.
What is a soap?
How will you check with the help of soap powder whether water is hard?
Arrange the following statements in correct sequence
- Pour that solution into an empty matchbox, soap can be obtained after drying.
- Take the necessary quantity of water in a jar.
- Then add coconut oil drop by drop and stir it well.
- Add concentrated sodium hydroxide in the jar and allow it to cool.
- Try this soap to wash your hand kerchief.
- Cover your work area with old newspaper.
