Hydroxyapatite [Ca5PO4) 3OH) ], the major component of tooth enamel, is attacked and decomposed by acids more readily than fluorapatite [Ca5PO4) 3F].Which of the following reactions is analogous to the reaction of hydroxyapatite with acid?
A) Ca(s) + 2 HCl (aq) CaCL2 (s) +2 H+
B) CaF2 (s) + 2H+(aq) Ca 2+(aq) + 2 HF(aq)
C) Ca(OH) 2 (s) + 2H+(aq) Ca2+(aq) +2H2O(l)
D) Ca(s) + 2H+(aq) Ca 2+(aq) +H2 (g)
E) Ca3(PO4) 2 (s) +6 H+(aq) 3 Ca 2+(aq) + 2H3PO4 (aq)
Correct Answer:
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