Tooth enamel is composed of the mineral hydroxyapatite. The K sp of hydroxyapatite, Ca 5 (PO 4 ) 3 OH, is 6.8 × 10 −37 . Calculate the solubility of hydroxyapatite in pure water in moles per liter. How is the solubility of hydroxyapatite affected by adding acid? When hydroxyapatite is treated with fluoride, the mineral fluorapatite, Ca 5 (PO 4 ) 3 F, forms. The K sp of this substance is 1 × 10 −60 . Calculate the solubility of fluorapatite in water. How do these calculations provide a rationale for the fluoridation of drinking water?
Tooth enamel is composed of the mineral hydroxyapatite. The K sp of hydroxyapatite, Ca 5 (PO 4 ) 3 OH, is 6.8 × 10 −37 . Calculate the solubility of hydroxyapatite in pure water in moles per liter. How is the solubility of hydroxyapatite affected by adding acid? When hydroxyapatite is treated with fluoride, the mineral fluorapatite, Ca 5 (PO 4 ) 3 F, forms. The K sp of this substance is 1 × 10 −60 . Calculate the solubility of fluorapatite in water. How do these calculations provide a rationale for the fluoridation of drinking water?
Solution Summary: The author explains the solubility of Hydroxyapatite in water, the effect of addition of acid over it, and the rationale for the fluoridation of water.
Tooth enamel is composed of the mineral hydroxyapatite. The Ksp of hydroxyapatite, Ca5(PO4)3OH, is 6.8 × 10−37. Calculate the solubility of hydroxyapatite in pure water in moles per liter. How is the solubility of hydroxyapatite affected by adding acid? When hydroxyapatite is treated with fluoride, the mineral fluorapatite, Ca5(PO4)3F, forms. The Ksp of this substance is 1 × 10−60. Calculate the solubility of fluorapatite in water. How do these calculations provide a rationale for the fluoridation of drinking water?
A solution contains 10-28 M TOTCO3 and is at pH 8.1. How much HCI (moles per liter of
solution) is required to titrate the solution to pH 7.0? (H2CO3: pKa1=6.35, pKa2=10.33)
Don't used Ai solution
The standard Gibbs energies of formation of CaO(s), CaCO3 (calcite), and CO2 (g) are
-604.04, -1128.80, and -394.37 kJ/mol, respectively. Find the value of AG, and Keq for the
following reaction:
CaCO3 CaO (s) + CO2 (g)
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A dry mixture containing 1 g of each solid [CaCO3(s) and CaO(s)] is on the lab bench in
contact with the atmosphere, which contains a partial pressure of 10-35 bar CO2 (g). What is
the total Gibbs free energy of the system containing all three species before any reaction has
happened? Does the equilibrium driving force favor conversion of one of the solids into the
other, or are the solids equilibrated with one another?
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Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell