To aid in the prevention of tooth decay, it is recommended that drinking water contain 0.800 ppm fluoride (F
To aid in the prevention of tooth decay, it is recommended that drinking water contain 0.800...
To aid in the prevention of tooth decay, it is recommended that drinking water contain 0.900 ppm fluoride (F–). (a) How many grams of F– must be added to a cylindrical water reservoir having a diameter of 6.44 × 102 m and a depth of 47.26 m? (b) How many grams of sodium fluoride, NaF, contain this much fluoride?
To aid in the prevention of tooth decay, it is recommended that drinking water contain 0.700 ppm fluoride, F. How many grams of F must be added to a cylindrical water reservoir having a diameter of 1.43 x 102 m and a depth of 88.52 а m?
Fluoride as a supplement or in the drinking water is a useful adjunct to tooth brushing until the age of years.
A mom is concerned about fluoridation in drinking water. She has read that the maximum contaminant concentration level goal for fluoride in drinking water is 4 ppm. The mom has discovered that her drinking water supply contains 0.8 ppm of sodium fluoride. How many milligrams of sodium fluoride are contained in one liter of drinking water containing 0.8 ppm of sodium fluoride? What is the ratio strength concentration of sodium fluoride in drinking water that contains 0.8 ppm 1I. of...
Dentists frequently use a 2% sodium fluoride solution in water to prevent tooth decay. Illustrate the manner by which a unit of sodium fluoride forms from atoms of the elements sodium and fluorine?
Sodium fluoride is added to many municipal water supplies to reduce tooth decay. Calculate the pH of a 3.82×10-3 M solution of NaF, given that the Ka of HF = 6.80 x 10-4 at 25°C.
39. Tooth enamel is hardened by_which is often added to drinking water. a. iron b. chloride c. chromium d. fluoride 40. Keratin, a protein found in hair and nails, contains the mineral a. iodine b. copper c. sulfur d. zinc 41. The most bioavailable (best absorbed) form of dietary iron, also called heme iron, is found in a. grains b. meat C. milk d. eggs
1.) a.) Sodium fluoride is added to many municipal water supplies to reduce tooth decay. Calculate the pH of a 3.78×10-3M solution of NaF, given that the Ka of HF = 6.80 x 10-4 at 25°C. b.)Calculate the pH of a solution that is 0.215M benzoic acid and 0.140M sodium benzoate, a salt whose anion is the conjugate base of benzoic acid. _____express the pH in at least 2 decimal places.
9) A drinking water plant adds 500 grams of fluoride to a water tank containing 500,000 liters of drinking water. What is the concentration of fluoride in the water in parts-per-million (ppm)? 10) A bottle of rubbing alcohol contains 75% by mass 2-propanol (C:HsO) in water. What are the mole fractions of 2-propanol and water in the solutions?
Parts per million (ppm) strengths 31 If drinking water contains 0.7 ppm of fluoride, how much fluoride (in milligrams) would be present in 1 litre of water?