Chapter 4, Problem 146DIA

Interpretation Introduction

To determine:

(a) Mass of fluoride ions (in g) in a 100.0 lb bag.

(b) (i) Mass of fluoride ions (in g) in a 100.0 lb bag of 25% fluorosilicic acid.

  (ii) Molarity of dilute fluorosilicic acid.

(c) (i) Amount of fluoride ions to be added to the water to meet the optimum amount of fluoride.

  (ii) Amount of fluorosilicic acid to be added to 50,000 gallons of water to meet the optimum amount of fluoride.

(d) (i) Amount of fluoride ions present in one glass of water.

  (ii) Explain why public treatment plants in both warm and cold regions meet the recommended F⁻ guideline.

(e) The compound, its amount, and cost that are needed to fluoridate public water supply in the community.

(f) How the reaction affects the amount of fluoridation required for public drinking water and the cost involved.

(g) The impact of the new standard on parts (e) and (f).