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March 29, 2015

Homework Help: Chemistry

Posted by Brennan on Tuesday, September 27, 2011 at 3:11pm.

Hard water contains Ca ,Mg ,Fe and , 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.

If 1100. of hard water contains 0.021 M of Ca and 0.0060 M of Mg , how many moles of Na are needed to replace these ions?

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

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