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 November 12th, 2008, 01:50 PM #1 Newbie   Joined: Nov 2008 Posts: 1 Thanks: 0 mass percent Calculate the percent by mass of sodium chloride if 20.0 g of sodium acetate is dissolved in enough water to make 200 g of solution. Can someone please help me figure out how to solve this? Thanks soo much.
 November 12th, 2008, 02:20 PM #2 Global Moderator     Joined: Nov 2006 From: UTC -5 Posts: 16,046 Thanks: 938 Math Focus: Number theory, computational mathematics, combinatorics, FOM, symbolic logic, TCS, algorithms Re: mass percent Total grams of sodium: 20 grams * weight of sodium / weight of sodium acetate Total grams of NaCl (assuming the solution has plenty of chlorine): total grams of sodium * weight of NaCl / weight of sodium Mass fraction: Total grams of NaCl / 200 g.
November 13th, 2008, 12:58 PM   #3
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Re: mass percent

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 Originally Posted by daydreembelievr Calculate the percent by mass of sodium chloride if 20.0 g of sodium acetate is dissolved in enough water to make 200 g of solution. Can someone please help me figure out how to solve this? Thanks soo much.
The problem statement seems to be missing something. Where did the chloride come from - how much and what form?

November 13th, 2008, 02:06 PM   #4
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Re: mass percent

Quote:
 Originally Posted by mathman The problem statement seems to be missing something. Where did the chloride come from - how much and what form?
I assumed that there were unlimited amounts in the solution. I think that's the usual way of doing things.

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# what is the percent by mass of sodium acetate in this solution

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