Question

Mention the essential material (chemicals) to prepare soap in the laboratory. Describe in brief the test of determining the nature (acidic/alkaline) of the reaction mixture of saponification reaction.​

Answer 1

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Raw Materials Required For preparation of soap in laboratory are :

●Vegetable oil

●Sodium Hydroxide

●Commom salt

Test to determine the nature of reaction mixture:

When a red litmus paper is dipped in the reaction mixture, the paper changes its colour to blue. Hence, the reaction mixture of the saponification reaction is basic in nature.

Answer 2

Soap is prepared by heating animal fat or vegetable oil with concentrated sodium hydroxide .

                              Heat

Fat or oil + NaOH ----------> Soap +Glycerol.

The process of making soap by the hydrolysis of fats and oils with alkalis is called Saponification.

Raw Materials Required For preparation of soap in Laboratory :

--> Vegetable oil

---> Sodium Hydroxide

---> Common salt

---> Beaker

---> Bunsen Burner.

TEST: soaps are mostly basic in nature and we can do litmus test red litmus will turn to blue.

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