Answered: A solution is made by dissolving 2.5 mg…

Chemistry & Chemical Reactivity

10th Edition

ISBN:9781337399074

Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Chapter1: Basic Concepts Of Chemistry

Section: Chapter Questions

Problem 49RGQ: Fluoridation of city water supplies has been practiced in the United States for several decades. It...

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A solution is made by dissolving 2.5 mg sodium fluoride (NaF) in 5.0 L of water at 20.0 degree Celsius. What is the fluoride ion concentration in ppm of the resulting solution, given the NaF is 45.0% fluoride ions by mass, and the density of water of 1.00 kg/L?

Expert Solution

Step 1

Given : Volume of water = 5.0 L

Mass of sodium fluoride i.e NaF dissolved = 2.5 mg = 2.5 X 10^-3 g (since 1 mg = 10^-3 g)

Mass percent of fluoride ions in NaF = 45.0 %

And density of water = 1.00 Kg/L.

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