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Enamel Bead
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) help he 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.
what mass of hydroxyapatite could form from 97 g of 89% phosphoric acid and 89 g of calcium hydroxide?
_______g Ca5(PO4)3(OH)
I have no idea where to start. please help me!!! thank you
3 H3PO4 + 5 Ca(OH)2 → Ca5(PO4)3(OH) + 9 H2O
(97 g H3PO4) x (0.89) / (97.9953 g/mol) = 0.880960617 moles H3PO4
(89 g Ca(OH)2) / (74.0932 g/mol) = 1.20118985 moles Ca(OH)2
0.880960617 moles of H3PO4 would react completely with (5/3) x 0.880960617 = 1.46826769 moles of Ca(OH)2, but there is less Ca(OH)2 than that present, so Ca(OH)2 is the limiting reactant.
(1.20118985 moles Ca(OH)2) x (1/5) x (502.3138 g/mol) = 121 g Ca5(PO4)3(OH)
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Smoky Quartz and Bead Enamel Stretch Bracelet
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