Homework Answers
# Fluoride :-
-17th most abundant element
-exists only in combination with other elements as fluoride compound
# Benefits of fluoride
-reduction of the solubility of enamel in acid
-reduction of the ability of plaque organisms to produce acid
-promotion of the remineralization of demineralized tooth surface
# Fluoride ion replaces hydroxy ions in hydroxyapatite crystal
# Four types of topical fluoride are :-
- sodium fluoride
- neutral sodium fluoride varnish
- acidulated phosphate fluoride
- stannous fluoride
# Systemic Fluoride ingested into body
-target: development of teeth
-also has topical effects from saliva and plaque
Examples of systemic fluoride
-water fluoridation
-dietary fluoride supplement
-fluoride in food and beverage
# Topical Fluoride - protection and decay resisting teeth surfaces
-target: erupted teeth
Examples of topical fluoride
-toothpaste
-mouth rinse
-professional fluoride
-water fluoridation
The equilibrium concentration of fluoride ion in a saturated magnesium fluoride solution is
The equilibrium concentration of fluoride ion in a saturated magnesium fluoride solution is
Project: Fluoride in our Drinking Water 1. What are the standards for fluoride in tap water,...
Project: Fluoride in our Drinking Water 1. What are the standards for fluoride in tap water, fountain water, and DI water? 2. Is this technique (ion-selective electrodes to quantify fluoride) a good one for a quantitative analysis of fluoride in water? Explain your reasoning. 3. Can you think of other methods that might work to analyze fluoride content in water?
113. What is the major function of fluoride? 114. Fluoride from fluoridated water helps to prevent...
113. What is the major function of fluoride? 114. Fluoride from fluoridated water helps to prevent what common health problem? 115. Is most bottled water fluoridated? 116. Fluoride toxicity: a. What are the symptoms of fluoride toxicity? b. Name 2 ways someone could get fluoride toxicity. c. Can you get a toxic dose of fluoride from fluoridated municipal tap water? Highlight 13, Phytochemicals 117. What are some health benefits of a diet rich in phytochemicals? 118. What foods provide phytochemicals?
Calcium nitrate and ammonium fluoride react to form calcium fluoride, dinitrogen monoxide, and water vapor. What...
Calcium nitrate and ammonium fluoride react to form calcium fluoride, dinitrogen monoxide, and water vapor. What mass of each substance is present after 10.08 g of calcium nitrate and 10.50 g of ammonium fluoride react completely? ?g calcium nitrate ?g ammonium fluoride ?g calcium fluoride ?g dinitrogen monoxide ?g water
Calcium nitrate and ammonium fluoride react to form calcium fluoride, dinitrogen monoxide, and water vapor. What...
Calcium nitrate and ammonium fluoride react to form calcium fluoride, dinitrogen monoxide, and water vapor. What mass of each substance is present after 28.34 g of calcium nitrate and 29.53 g of ammonium fluoride react completely? g calcium nitrate g ammonium fluoride g calcium fluoride g dinitrogen monoxide g water
The fluoride rinse in dental offices usually contains sodium fluoride. Sodium fluoride can be prepared from...
The fluoride rinse in dental offices usually contains sodium fluoride. Sodium fluoride can be prepared from the reaction between sodium metal and fluorine gas. Which properly represents the balanced chemical equation for this reaction? Na(s) + F2(g) → NaF2(s) Na(s) + F(g) → NaF(s) 7Na(s) + F(g) → Na7F(s) 2Na(s) + F2(g) → 2Na2F(s) 2Na(s) + F2(g) → 2NaF(s) Why is it important to understand this equation? What do you think could happen if this is incorrect?
The molar solubility of lead fluoride in a 0.252 M ammonium fluoride solution is M. Show...
The molar solubility of lead fluoride in a 0.252 M ammonium fluoride solution is M.
Construct a scenario where Barium fluoride is precipitating. Barium fluoride (BaF2) Ksp=1.7x10^-6
Construct a scenario where Barium fluoride is precipitating. Barium fluoride (BaF2) Ksp=1.7x10^-6
A buffer solution contains 0.100 mole of sodium fluoride and 0.130 mole of hydrogen fluoride in...
A buffer solution contains 0.100 mole of sodium fluoride and 0.130 mole of hydrogen fluoride in one liter of solution Calculate (a) the concentration of the fluoride ion after the addition of 0.02500 mole of HCI to this solution. (b) the pH after the addition of 0.02500 mole of HCl to this solution Ka for HF is 6,8 x 10-4 HF - HUF NaF-Na* + F
The Ksp of barium fluoride is 1.00 x 10–6. The Ksp of calcium fluoride is 3.90...
The Ksp of barium fluoride is 1.00 x 10–6. The Ksp of calcium fluoride is 3.90 x 10–11. An aqueous solution of sodium fluoride is slowly added to a water sample that contains barium ion (3.00×10-2M ) and calcium ion (5.95×10-2M ). What is the remaining concentration of the first ion to precipitate when the second ion begins to precipitate?
The equilibrium concentration of fluoride ion in a saturated magnesium fluoride solution is
The molar solubility of lead fluoride in a 0.252 M ammonium fluoride solution is M.
A buffer solution contains 0.100 mole of sodium fluoride and 0.130 mole of hydrogen fluoride in one liter of solution Calculate (a) the concentration of the fluoride ion after the addition of 0.02500 mole of HCI to this solution. (b) the pH after the addition of 0.02500 mole of HCl to this solution Ka for HF is 6,8 x 10-4 HF - HUF NaF-Na* + F
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