JohnConnor94G JohnConnor94G

01-11-2022
Chemistry

Answered

3. Tooth enamel is the hardest substance in the body and is mainly the mineral hydroxyapatite, Ca10(PO4)6(OH)2. If 1.000 g of tooth enamel reacts with hydrochloric acid to give 0.925 g of CaCl2, what is the percentage of hydroxyapatite in tooth enamel?

Ca10(PO4)6(OH)2(s) + 20 HCl(aq) → 10 CaCl₂(aq) + 6 H3PO4(aq) + 2 H₂O(1)

Answer :

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