Hard water contains Ca2+, Mg2+, and Fe2+, which interferewith the action of soap and leave an insoluble coating onthe insides of containers and pipes when heated. Water softenersreplace these ions with Na+. Keep in mind that chargebalance must be maintained. (a) If 1500 L of hard water contains0.020 M Ca2+ and 0.0040 M Mg2+, how many moles ofNa+ are needed to replace these ions? (b) If the sodium isadded to the water softener in the form of NaCl, how manygrams of sodium chloride are needed?
Hard water contains Ca2+, Mg2+, and Fe2+, which interferewith the action of soap and leave an insoluble coating onthe insides of containers and pipes when heated. Water softenersreplace these ions with Na+. Keep in mind that chargebalance must be maintained. (a) If 1500 L of hard water contains0.020 M Ca2+ and 0.0040 M Mg2+, how many moles ofNa+ are needed to replace these ions? (b) If the sodium isadded to the water softener in the form of NaCl, how manygrams of sodium chloride are needed?
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Hard water contains Ca2+, Mg2+, and Fe2+, which interfere
with the action of soap and leave an insoluble coating on
the insides of containers and pipes when heated. Water softeners
replace these ions with Na+. Keep in mind that charge
balance must be maintained. (a) If 1500 L of hard water contains
0.020 M Ca2+ and 0.0040 M Mg2+, how many moles of
Na+ are needed to replace these ions? (b) If the sodium is
added to the water softener in the form of NaCl, how many
grams of sodium chloride are needed?
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