Chapter 4: Carbon and Its Compounds

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Carbon and Its Compound

Question:

Would you be able to check if water is hard by using a detergent?

Answer:

When soaps are dissolved in hard water, the calcium or magnesium ions present in hard water displace sodium or potassium from the soap molecule to form insoluble calcium or magnesium salts of fatty acids. Detergents on the other hand can form lather in both hard water and soft water. So, water cannot be checked by using detergents.


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