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Hydroxyapatite [Ca5PO4)3OH)], the Major Component of Tooth Enamel, Is Attacked \rightarrow

Question 55

Multiple Choice

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) \rightarrow CaCL2 (s) +2 H+
B) CaF2 (s) + 2H+(aq) \rightarrow Ca 2+(aq) + 2 HF(aq)
C) Ca(OH) 2 (s) + 2H+(aq) \rightarrow Ca2+(aq) +2H2O(l)
D) Ca(s) + 2H+(aq) \rightarrow Ca 2+(aq) +H2 (g)
E) Ca3(PO4) 2 (s) +6 H+(aq) \rightarrow 3 Ca 2+(aq) + 2H3PO4 (aq)

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