Problem: 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.If the sodium is added to the water softener in the form of NaCl, how many grams of sodium chloride are needed?

FREE Expert Solution

From the previous problem, it requires 60 mol of Na+ from Ca2+ and 12 mol of Na+ from Mg2+

Calculating the mass of NaCl:

MM of NaCl is 58.45 g/mol

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Problem Details

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.

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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Our tutors have indicated that to solve this problem you will need to apply the Stoichiometry concept. You can view video lessons to learn Stoichiometry. Or if you need more Stoichiometry practice, you can also practice Stoichiometry practice problems.