The recommended concentration of fluoride ion in drinking water is up to 1 ppm as fluoride ion is required to make teeth enamel harder by converting [3Ca₃ (PO4)2.Ca(OH)_2] to

[3{Ca(OH)₂}. CaF₂]

[CaF₂]

[3(CaF₂). Ca(OH)₂]

[3Ca₃(PO₄)₂. CaF₂]

Solution

[3Ca₃(PO₄)₂. CaF₂]

$3 C a_{3} (P O_{4})_{2} . C a (O H)_{2}] + 2 F^{-} \overset{}{\to} \underset{H a r d e r T e e t h e n a m e l}{3 C a_{3} (P O_{4})_{2} . C a F_{2}]} + 2 O H^{-}$

Some More Questions From Environmental Chemistry Chapter

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Environmental Chemistry

The recommended concentration of fluoride ion in drinking water is up to 1 ppm as fluoride ion is required to make teeth enamel harder by converting [3Ca₃ (PO4)2.Ca(OH)_2] to

[3{Ca(OH)₂}. CaF₂]

[CaF₂]

[3(CaF₂). Ca(OH)₂]

[3Ca₃(PO₄)₂. CaF₂]

Some More Questions From Environmental Chemistry Chapter

In what regions of the atmosphere, the temperature increases with altitude and in which regions it decreases?

What is the size range of particulates?

How particulates help in the cloud formation?

Name three gases which are major air pollutants.

What are primary and secondary pollutants of the air?

Which zone is called ionosphere?

Give one harmful effect of classical smog.

What is PAN?

Name the components of photochemical smog which cause irritation of eyes.

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NCERT Sample Papers

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Environmental Chemistry

The recommended concentration of fluoride ion in drinking water is up to 1 ppm as fluoride ion is required to make teeth enamel harder by converting [3Ca3 (PO4)2.Ca(OH)2] to [3{Ca(OH)2}. CaF2] [CaF2] [3(CaF2). Ca(OH)2] [3Ca3(PO4)2. CaF2]

Some More Questions From Environmental Chemistry Chapter

In what regions of the atmosphere, the temperature increases with altitude and in which regions it decreases?

What is the size range of particulates?

How particulates help in the cloud formation?

Name three gases which are major air pollutants.

What are primary and secondary pollutants of the air?

Which zone is called ionosphere?

Give one harmful effect of classical smog.

What is PAN?

Name the components of photochemical smog which cause irritation of eyes.

Mock Test Series

NCERT Sample Papers

Entrance Exams Preparation

The recommended concentration of fluoride ion in drinking water is up to 1 ppm as fluoride ion is required to make teeth enamel harder by converting [3Ca₃ (PO4)2.Ca(OH)_2] to

[3{Ca(OH)₂}. CaF₂]

[CaF₂]

[3(CaF₂). Ca(OH)₂]

[3Ca₃(PO₄)₂. CaF₂]