What are the essential ingredients of toothpaste, and what is the function of each?

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Solution

The essential ingredients of toothpaste are calcium carbonate, calcium hydrogen phosphate, and fluoride.

Calcium carbonate and calcium hydrogen phosphate help in removing the dirt on teeth and also polish them. Fluoride helps prevent decay of our teeth and also helps in strengthening the enamel which covers the teeth.

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Write answer to the following questions.

(a) How does the use of a detergent help to clean soiled clothes ?

(b) How will you check with the help of soap powder whether water is hard ?

(c) What are the important ingredients of a toothpaste , and what is the function of each ?

(d) What are the ingredients of cements ?

(e) What will happen if cement is not used in making concrete ?

(f) Make a list of detergents that you use.

(g) What should be expected from a detergent for delicate garments ?

(h) What is meant by ' surface activity'? Name three chemicals responsible for the surface activity of various detergents.

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