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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 [ 3 C a 3 P O 4 2 . C a O H 2 ] to

Options

  1. A[ 3 C a O H ) 2 . C a F 2
  2. BC a F 2
  3. C3 C a F 2 . C a O H 2
  4. D[ 3 C a 3 P O 4 ) 2 . C a F 2

Correct answer

D. [ 3 C a 3 P O 4 ) 2 . C a F 2

Step-by-step solution

[ 3 C a 3 ( P O 4 ) 2 . C a O H ) 2 + 2 F - → 3 C a 3 P O 4 2 . C a F 2 + 2 O H -

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