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10 Nov 2019
EDTA ANALYSIS QUESTION HELP PLEASE!!
Hydroxyapatite is the primary constituent of tooth enamel, and is the hardest substance in the human body. Addition of F- to drinking water converts hydroxyapatite to fluoroapatite, Ca5(PO4)3F. The Ksp of hydroxyapatite, Ca5(PO4)3OH is 6.8 X 10-37 and the Ksp for fluoroapatite is 1 times 10-60. All other pertinent K values can be found in the textbook Write a series of equilibrium expressions, a mass balance and a charge balance representing the complete reaction of hydroxyapatite, including the solubility, and the further reactions of phosphate with water. Write a series of equilibrium expressions, a mass balance and a charge balance representing the complete reaction of hydroxyapatite, including the solubility, and the further reactions of phosphate and fluoride with water. Calculate the [Ca+2] in a saturated solution of hydroxyapatite buffered at pH 6.5, assuming further reaction of PO4-3 Calculate the [Ca+2] in a solution of fluoroapatite buffered at pH = 6.5, assuming all further reactions with water occur. Comment on the significance of the results of part (c) and part (d). Why do you think it is a good idea to fluoridate drinking water? Write a series of equilibrium expressions, a mass balance and a charge balance presenting the complete reaction of 0.010 M H4EDTA Calculate the [Ca2+] in a saturated solution of hydroxyapatite containing 0.01 M H4EDTA buffered at pH 6.5. Calculate the [Ca2+] in a saturated solution of fluoroapatite containing 0.01 M H4EDTA buffered at pH 6.5. Small amounts of EDTA are used as preservatives in some foods. Comment on why this might not be a good idea.
EDTA ANALYSIS QUESTION HELP PLEASE!!
Hydroxyapatite is the primary constituent of tooth enamel, and is the hardest substance in the human body. Addition of F- to drinking water converts hydroxyapatite to fluoroapatite, Ca5(PO4)3F. The Ksp of hydroxyapatite, Ca5(PO4)3OH is 6.8 X 10-37 and the Ksp for fluoroapatite is 1 times 10-60. All other pertinent K values can be found in the textbook Write a series of equilibrium expressions, a mass balance and a charge balance representing the complete reaction of hydroxyapatite, including the solubility, and the further reactions of phosphate with water. Write a series of equilibrium expressions, a mass balance and a charge balance representing the complete reaction of hydroxyapatite, including the solubility, and the further reactions of phosphate and fluoride with water. Calculate the [Ca+2] in a saturated solution of hydroxyapatite buffered at pH 6.5, assuming further reaction of PO4-3 Calculate the [Ca+2] in a solution of fluoroapatite buffered at pH = 6.5, assuming all further reactions with water occur. Comment on the significance of the results of part (c) and part (d). Why do you think it is a good idea to fluoridate drinking water? Write a series of equilibrium expressions, a mass balance and a charge balance presenting the complete reaction of 0.010 M H4EDTA Calculate the [Ca2+] in a saturated solution of hydroxyapatite containing 0.01 M H4EDTA buffered at pH 6.5. Calculate the [Ca2+] in a saturated solution of fluoroapatite containing 0.01 M H4EDTA buffered at pH 6.5. Small amounts of EDTA are used as preservatives in some foods. Comment on why this might not be a good idea.