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Hydroxyapatite, [Ca5(PO4)3(OH)], the Major Component of Tooth Enamel, Is Attacked \rightarrow

Question 74

Multiple Choice

Hydroxyapatite, [Ca5(PO4) 3(OH) ], the major component of tooth enamel, is attacked and decomposed by acids more readily than fluorapatite, [Ca5(PO4) 3F]. Which one of the following reactions is analogous to the reaction of hydroxyapatite?


A) Ca(s) + 2HCl(aq) \rightarrow CaCl2(s) + 2H+
B) CaF2(s) + 2H+(aq) \rightarrow Ca2+(aq) + 2HF(aq)
C) Ca(OH) 2(s) + 2H+(aq) \rightarrow Ca2+(aq) + 2H2O(l)
D) Ca(s) + 2H+(aq) \rightarrow Ca2+(aq) + H2(g)
E) Ca3(PO4) 2(s) + 6H+(aq) \rightarrow 3Ca2+(aq) + 2H3PO4(aq)

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