Saturday
February 28, 2015

Homework Help: chemistry

Posted by M on Monday, January 25, 2010 at 2:49am.

Water softeners often replace calcium ions in hard water with sodium ions. Since sodium compounds are soluble, the presence of sodium ions in water does not cause the white, scaly residues caused by calcium ions. However, calcium is more beneficial to human health than sodium because calcium is a necessary part of the human diet, while high levels of sodium intake are linked to increases in blood pressure. The U.S. Food and Drug Administration (FDA) recommends that adults ingest less than 2.4 g of sodium per day.

How many liters of softened water, containing a sodium concentration of 5.610^−2% sodium by mass, have to be consumed to exceed the FDA recommendation? (Assume a water density of 1.0 g/mL)

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

Chemistry - Hard water contains Ca ,Mg ,Fe and , which interfere with the action...
Science Question - Which of the following statements best describes what is ...
Chemistry - An ion exchange process may be used to remove ions causing hardness ...
Chem Help - You are given several grams of solid sodium chloride and water and ...
Chemistry 20 - Sorry, the 1st part to those 2 questions are: Hard water contains...
Chemistry - Describe what hard water is and how a water softening unit works. ...
chemistry - 50.00 mL of OOH was diluted to 250.0 mL with deionized water. In the...
Chemistry - 50.00 mL of OOH was diluted to 250.0 mL with deionized water. In the...
Chemistry - 50.00 mL of OOH was diluted to 250.0 mL with deionized water. In the...
chemistry - The concentration of calcium ions in hard water can be determined by...

Members