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Topic: Question regarding mass percent concentration of a saline solution  (Read 8159 times)

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Offline slu1986

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Question regarding mass percent concentration of a saline solution
« on: September 11, 2008, 02:37:28 PM »
What is the mass percent concentration of a saline solution prepared by dissolving 1.00 moles of NaCl in 1.00 L of water?

The answer is = 5.52 mass %

I know how to calculate mass percent, but I am a little thrown off by the 1.00 L of water.  I cannot seem to figure out how to set the problem up.  I am reading my textbook and I am working the problems along the way to learn how to do them.  However, I am stumped on this one.  I know Molarity = moles of solute/liters of solution, but that isn't the question.  Mass percent = mas of component/total mass of solution X 100 %.   Could someone please help me with this? 

Offline Borek

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Re: Question regarding mass percent concentration of a saline solution
« Reply #1 on: September 11, 2008, 03:12:11 PM »
Mass percent = mas of component/total mass of solution X 100 %

You have 1.00 L of water and 1.00 mole of NaCl. What are their respective masses? What is total mass of the solution?
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Offline slu1986

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Re: Question regarding mass percent concentration of a saline solution
« Reply #2 on: September 11, 2008, 03:37:23 PM »
Thank you soo much! I understand how to do it now!  ;D

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