Chemistry - Environmental Chemistry Question with Solution | TestHub

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$[3\mathrm{C}{\mathrm{a}}_3{\left(\mathrm{P}{\mathrm{O}}_4\right)}_2.\mathrm{C}\mathrm{a}{\left(\mathrm{O}\mathrm{H}\right)}_2]$to