Chapter 4, Problem 38E

In many communities, water is fluoridated to prevent tooth decay. In the United States. for example, more than half of fie population served by public water systems has access to water that is fluoridated at approximately 1 mg F- per liter. (a) What is the molarity of F- in water if itcontains 1.2 mg F- per liter? (b) How many grams of solid KF should be added to a $\text{1}{\text{.6 ×10}}^{\text{5}}\text{L}$ water reservoir to give a fluoride concentrationof 1.2 mg F- per liter?