Respuesta :
The equation of the reaction is:
[tex]5Ca(OH)_{2} + 3H_{3} PO_{4}[/tex] → [tex]Ca_{5} (PO_{4} )_{3} (OH) + 9H_{2} O[/tex]
Based on the data provided, the mass of hydroxyapatite formed is 135.62 g.
The mass of hydroxyapatite prepared from 100.0 g of 85% phosphoric acid and 100.0 g of calcium hydroxide? is calculated as follows:
100.0 g of 85% phosphoric acid contains 100 * 85/100 g of phosphoric acid = 85.0 g.
moles of phosphoric acid in 85 g = mass/molar mass
molar mass of phosphoric acid = 97.994 g/mol
moles of phosphoric acid in 85 g = 85.0 g/97.994 g/mol
moles of phosphoric acid in 85 g = 0.87 moles
moles of calcium hydroxide in 100.0 g = mass/molar mass
molar mass of calcium hydroxide = 74.093 g/mol
moles of calcium hydroxide in 100.0 g = 100.0 g/74.093 g/mol
moles of calcium hydroxide in 100.0 g = 1.35 moles
From the equation of the reaction, Ca(OH)₂ react with H₃PO₄ in a 5: 3 molar ratio.
5 mol of Ca(OH)₂ produce 1 mole Ca₅(PO₄)₃(OH)
1.35 mol of Ca(OH)₂ will produce 1.35 * 1/5 moles of Ca₅(PO₄)₃(OH) = 0.27 moles
mass of 0.27 moles of hydroxyapatite = no. of moles * molar mass
molar mass of hydroxyapatite = 502.3 g/mol
mass of hydroxyapatite = 0.27 mol * 502.3 g/mol
mass of hydroxyapatite = 135.62 g
Therefore, the mass of hydroxyapatite produced is 135.62 g.
What is hydroxyapatite ?
Calcium apatite has the chemical formula Ca5(PO4)3(OH), however it is most commonly written Ca10(PO4)6(OH)2 to indicate that the crystal unit cell consists of two entities. Hydroxyapatite, also known as hydroxylapatite (HA), is a naturally occurring mineral form of calcium apatite. The complex apatite group's hydroxyl endmember is called hydroxyapatite. Fluorapatite or chlorapatite can be created by substituting fluoride, chloride, or carbonate for the OH ion. It forms a hexagonal crystal structure when it crystallizes. Powdered hydroxyapatite is completely white. Apatites that are found in nature can also exhibit colorations that resemble dental fluorosis, such as brown, yellow, or green.
Human bone contains up to 50% by volume and 70% by weight of bone mineral, a modified form of hydroxyapatite.
To learn more about hydroxyapatite from the given link:
brainly.com/question/12797496
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