The $\mathrm{F}^{-}$ ions make the enamel on teeth much harder by converting hydroxyapatite (the enamel on the surface of teeth) into much harder fluoroapatite having the formula.
Solution
<p>Hydroxyapatite : $$\left[3\left(\mathrm{Ca}_3\left(\mathrm{PO}_4\right)_2\right) \cdot \mathrm{Ca}(\mathrm{OH})_2\right]$$</p>
<p>Fluoroapatite : $$\left[3\left(\mathrm{Ca}_3\left(\mathrm{PO}_4\right)_2\right) \cdot \mathrm{CaF}_2\right]$$</p>
About this question
Subject: Chemistry · Chapter: Biomolecules · Topic: Carbohydrates
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