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  
Global Moderator Joined: May 2007 Posts: 6,834 Thanks: 733  Re: mass percent Quote:
 
November 13th, 2008, 02:06 PM  #4  
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 Quote:
 

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