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How Are Synthetic Detergents Better than Soap? - Chemistry

How are synthetic detergents better than soap?

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Solution 1

Soaps work in soft water. However, they are not effective in hard water. In contrast, synthetic detergents work both in soft water and hard water.

Therefore, synthetic detergents are better than soaps.

Solution 2

They can be used in hard water as well as in acidic solution. The reason being that sulphonic acids and their calcium and magnesium salts are soluble in water thus they do not form curdy white precipitate with hard water but the fatty acids and their calcium and magnesium salts of soaps are insoluble. Detergents also works in slightly acidic solution due to formation of soluble alkyl hydrogen sulphates. Soaps react with acidic solution to form insoluble fatty acids.

Concept: Cleansing Agents - Synthetic Detergents
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NCERT Class 12 Chemistry Textbook
Chapter 16 Chemistry in Everyday Life
Q 20 | Page 454
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