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Sodium Fluoride (NaF) Is Added to Drinking Water in Some

Question 69

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Sodium fluoride (NaF) is added to drinking water in some municipalities to protect teeth against cavities. The idea is to convert hydroxyapatite, Ca10(PO4) 6(OH) 2, into more stable fluorapatite, Ca10(PO4) 6F2. The molar mass of hydroxyapatite is 502 g/mol. What is the molarity of a 10.0 mg/L sodium fluoride solution?


A) 2.38 Sodium fluoride (NaF) is added to drinking water in some municipalities to protect teeth against cavities. The idea is to convert hydroxyapatite, Ca<sub>10</sub>(PO<sub>4</sub>) <sub>6</sub>(OH) <sub>2</sub>, into more stable fluorapatite, Ca<sub>10</sub>(PO<sub>4</sub>) <sub>6</sub>F<sub>2</sub>. The molar mass of hydroxyapatite is 502 g/mol. What is the molarity of a 10.0 mg/L sodium fluoride solution? A) 2.38 M B) 1.99 M C) 2.63 M D) 1.19 M E) 0.263 M Sodium fluoride (NaF) is added to drinking water in some municipalities to protect teeth against cavities. The idea is to convert hydroxyapatite, Ca<sub>10</sub>(PO<sub>4</sub>) <sub>6</sub>(OH) <sub>2</sub>, into more stable fluorapatite, Ca<sub>10</sub>(PO<sub>4</sub>) <sub>6</sub>F<sub>2</sub>. The molar mass of hydroxyapatite is 502 g/mol. What is the molarity of a 10.0 mg/L sodium fluoride solution? A) 2.38 M B) 1.99 M C) 2.63 M D) 1.19 M E) 0.263 M M
B) 1.99 Sodium fluoride (NaF) is added to drinking water in some municipalities to protect teeth against cavities. The idea is to convert hydroxyapatite, Ca<sub>10</sub>(PO<sub>4</sub>) <sub>6</sub>(OH) <sub>2</sub>, into more stable fluorapatite, Ca<sub>10</sub>(PO<sub>4</sub>) <sub>6</sub>F<sub>2</sub>. The molar mass of hydroxyapatite is 502 g/mol. What is the molarity of a 10.0 mg/L sodium fluoride solution? A) 2.38 M B) 1.99 M C) 2.63 M D) 1.19 M E) 0.263 M Sodium fluoride (NaF) is added to drinking water in some municipalities to protect teeth against cavities. The idea is to convert hydroxyapatite, Ca<sub>10</sub>(PO<sub>4</sub>) <sub>6</sub>(OH) <sub>2</sub>, into more stable fluorapatite, Ca<sub>10</sub>(PO<sub>4</sub>) <sub>6</sub>F<sub>2</sub>. The molar mass of hydroxyapatite is 502 g/mol. What is the molarity of a 10.0 mg/L sodium fluoride solution? A) 2.38 M B) 1.99 M C) 2.63 M D) 1.19 M E) 0.263 M M
C) 2.63 Sodium fluoride (NaF) is added to drinking water in some municipalities to protect teeth against cavities. The idea is to convert hydroxyapatite, Ca<sub>10</sub>(PO<sub>4</sub>) <sub>6</sub>(OH) <sub>2</sub>, into more stable fluorapatite, Ca<sub>10</sub>(PO<sub>4</sub>) <sub>6</sub>F<sub>2</sub>. The molar mass of hydroxyapatite is 502 g/mol. What is the molarity of a 10.0 mg/L sodium fluoride solution? A) 2.38 M B) 1.99 M C) 2.63 M D) 1.19 M E) 0.263 M Sodium fluoride (NaF) is added to drinking water in some municipalities to protect teeth against cavities. The idea is to convert hydroxyapatite, Ca<sub>10</sub>(PO<sub>4</sub>) <sub>6</sub>(OH) <sub>2</sub>, into more stable fluorapatite, Ca<sub>10</sub>(PO<sub>4</sub>) <sub>6</sub>F<sub>2</sub>. The molar mass of hydroxyapatite is 502 g/mol. What is the molarity of a 10.0 mg/L sodium fluoride solution? A) 2.38 M B) 1.99 M C) 2.63 M D) 1.19 M E) 0.263 M M
D) 1.19 Sodium fluoride (NaF) is added to drinking water in some municipalities to protect teeth against cavities. The idea is to convert hydroxyapatite, Ca<sub>10</sub>(PO<sub>4</sub>) <sub>6</sub>(OH) <sub>2</sub>, into more stable fluorapatite, Ca<sub>10</sub>(PO<sub>4</sub>) <sub>6</sub>F<sub>2</sub>. The molar mass of hydroxyapatite is 502 g/mol. What is the molarity of a 10.0 mg/L sodium fluoride solution? A) 2.38 M B) 1.99 M C) 2.63 M D) 1.19 M E) 0.263 M Sodium fluoride (NaF) is added to drinking water in some municipalities to protect teeth against cavities. The idea is to convert hydroxyapatite, Ca<sub>10</sub>(PO<sub>4</sub>) <sub>6</sub>(OH) <sub>2</sub>, into more stable fluorapatite, Ca<sub>10</sub>(PO<sub>4</sub>) <sub>6</sub>F<sub>2</sub>. The molar mass of hydroxyapatite is 502 g/mol. What is the molarity of a 10.0 mg/L sodium fluoride solution? A) 2.38 M B) 1.99 M C) 2.63 M D) 1.19 M E) 0.263 M M
E) 0.263 M

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