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Chemistry In Everyday Life

Question

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Can you use soaps and synthetic detergents to check the hardness of water?

Solution

Soap does not lather with hard water easily because it reacts with the calcium and magnesium ions present in hard water to form insoluble calcium and magnesium salts.
2C₁₇H₃₅COONa +CaCl₂ --> 2NaCl +(C₁₇H₃₅COO)₂Ca
^{soap calcium in water insoluble calcium scum}
On the other hand, synthetic detergents give lather with hard water as well as soft water.

Some More Questions From Chemistry in Everyday Life Chapter

Name the macro-molecules that are chosen as drug targets.

Why should not medicines be taken without consulting doctors?

Name a substance which can be used as an antiseptic as well as disinfectant.

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What are food preservatives?

Name the sweetening agent used in the preparation of sweet for a diabetic patient.

Why should not medicines be taken without consulting doctors?

Explain why sweetener is predicted to become great commercial success.

If water contains dissolved calcium bicarbonate, out of soaps and synthetic detergents which one will you use for cleaning clothes?

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