68. How many grams of sodium fluorideshould be added to 100,000 liters ofdrinking water containing 0.6 ppm ofsodium fluoride to provide a recom-mended concentration of 1.75 ppm?69. If a city water supply has a limit of 250ppm of nitrate ion, what is the maximumamount of nitrate ion, in grams, that maybe present in a 10,000-gallon reservoir?

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Answered: How many grams of sodium fluoride…

How many grams of sodium fluoride should be added to 100,000 liters of drinking water containing 0.6 ppm of sodium fluoride to provide a recom- mended concentration of 1.75 ppm?

Advanced Engineering Mathematics

10th Edition

ISBN:9780470458365

Author:Erwin Kreyszig

Publisher:Erwin Kreyszig

Chapter2: Second-order Linear Odes

Section: Chapter Questions

Problem 1RQ

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Question

68. How many grams of sodium fluoride
should be added to 100,000 liters of
drinking water containing 0.6 ppm of
sodium fluoride to provide a recom-
mended concentration of 1.75 ppm?
69. If a city water supply has a limit of 250
ppm of nitrate ion, what is the maximum
amount of nitrate ion, in grams, that may
be present in a 10,000-gallon reservoir?

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