Question

The conversion of hydroxyapatite occurs due to presence of p - ions in water. The correct formula of hydroxyapatite is ______.

Options

• \[\ce{[3Ca3(PO4)2 * CaF2]}\]

• \[\ce{[Ca3(PO4)2 * CaF2]}\]

• \[\ce{[3Ca(OH)2 * CaF2]}\]

• \[\ce{[3Ca3(PO4)2 * Ca(OH)2]}\]

Answer 1

The conversion of hydroxyapatite occurs due to presence of p - ions in water. The correct formula of hydroxyapatite is \[\underline{\ce{[3Ca3(PO4)2 * Ca(OH)2]}}\].

Explanation:

By converting the hydroxyapatite \[\ce{[3Ca3(PO4)2 * Ca(OH)2]}\] on the surface of the teeth into the considerably harder fluroappatite \[\ce{[Ca3(PO4)2 * CaF2]}\], the F^- ions make the enamel on teeth more tougher.