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23 Nov 2019

tooth enamel in mainly hydroxyapatite, Ca10(PO4)6(OH)2. If 1.117gof tooth enamel reacts with acid to give 1.111g of calciumchloride, what is the percentage of hydroxyapatite in the toothenamel sample?

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Nestor Rutherford
Nestor RutherfordLv2
8 Mar 2019

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Related questions

EDTA ANALYSIS QUESTION HELP PLEASE!!



Be sure to answer all parts.

Hydroxyapatite, Ca5(PO4)3(OH), is the main mineral component of dental enamel, dentin, and bone, and thus it has many medical uses. Coating it on metallic implants (such as titanium alloys and stainless steels) helps the body accept the implant. In the form of powder and beads, it is used to fill bone voids, which encourages natural bone to grow into the void. Hydroxyapatite is prepared by adding aqueous phosphoric acid to a dilute slurry of calcium hydroxide.

(a) Write a balanced equation for this preparation. Be sure to include the state of each reactant and product in the equation. Hint: Liquid water is one of the products of this reaction.



(b) What mass of hydroxyapatite could form from

103 g

of

95.0%

phosphoric acid and

103 g

of calcium hydroxide?

g Ca5(PO4)3(OH)

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