document.write( "Question 1148988: Hi\r
\n" ); document.write( "\n" ); document.write( "Sorry but I made a misread my previous question. The question should be as follows; There is 500g of an 8 percent salt solution. In order to make the concentration of this saline solution 10 percent, how many grams of water need to be evaporated.\r
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Algebra.Com's Answer #770333 by ikleyn(52932)\"\" \"About 
You can put this solution on YOUR website!
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\n" ); document.write( "\n" ); document.write( "            It can be explained on an intuitive level or solved using Algebra.\r
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\n" ); document.write( "\n" ); document.write( "            First I place an intuitive explanation.\r
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document.write( "500 grams of the 8% salt solution (mass-to-mass concentration) contain 500*0.08 = 40 grams of dissolved salt.\r\n" );
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document.write( "You want to have 10% salt solution.  It means that with 40 grams of salt, the total mass of the 10% solution should be 400 grams.\r\n" );
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document.write( "Hence,  100 grams of water = 500 g -400 g  should be evaporated.    ANSWER\r\n" );
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\n" ); document.write( "\n" ); document.write( "            Thus the intuitive explanation is just completed.\r
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\n" ); document.write( "\n" ); document.write( "            The formal algebra solution is as follows.\r
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document.write( "Again, 500 grams of the 8% solution contain  500*0.08 = 40 grams of dissolved salt.\r\n" );
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document.write( "When you evaporate water, the mass of the dissolved salt remains with no change.\r\n" );
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document.write( "Let \"W\" be the mass (in grams) of the water to evaporate.  Then the equation for the 10% concentration is\r\n" );
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document.write( "    \"40%2F%28500-w%29\" = 0.1.\r\n" );
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document.write( "Solve it step by step. First step is to cross-multiply\r\n" );
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document.write( "    40 = 0.1*(500-W)\r\n" );
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document.write( "    40 = 50 - 0.W\r\n" );
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document.write( "    0.1W = 50 - 40 \r\n" );
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document.write( "    0.1W  = 10\r\n" );
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document.write( "       W  = 10/0.1 = 100.\r\n" );
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document.write( "ANSWER.  The mass of water to evaporate is  100 grams.\r\n" );
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document.write( "Notice you got the same answer.\r\n" );
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\n" ); document.write( "\n" ); document.write( "There is entire bunch of lessons covering various types of mixture problems\r
\n" ); document.write( "\n" ); document.write( "    - Mixture problems (*)\r
\n" ); document.write( "\n" ); document.write( "    - More Mixture problems\r
\n" ); document.write( "\n" ); document.write( "    - Solving typical word problems on mixtures for solutions \r
\n" ); document.write( "\n" ); document.write( "    - Word problems on mixtures for antifreeze solutions \r
\n" ); document.write( "\n" ); document.write( "    - Word problems on mixtures for dry substances like coffee beans, nuts, cashew and peanuts\r
\n" ); document.write( "\n" ); document.write( "    - Word problems on mixtures for dry substances like candies, dried fruits\r
\n" ); document.write( "\n" ); document.write( "    - Word problems on mixtures for dry substances like soil and sand\r
\n" ); document.write( "\n" ); document.write( "    - Word problems on mixtures for alloys \r
\n" ); document.write( "\n" ); document.write( "    - Typical word problems on mixtures from the archive\r
\n" ); document.write( "\n" ); document.write( "    - Advanced mixture problems \r
\n" ); document.write( "\n" ); document.write( "    - Advanced mixture problem for three alloys \r
\n" ); document.write( "\n" ); document.write( "    - Unusual word problem on mixtures \r
\n" ); document.write( "\n" ); document.write( "    - Check if you know the basics of mixtures from Science \r
\n" ); document.write( "\n" ); document.write( "    - OVERVIEW of lessons on word problems for mixtures\r
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\n" ); document.write( "\n" ); document.write( "A convenient place to quickly observe these lessons from a  \"bird flight height\"  (a top view)  is the last lesson in the list.\r
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\n" ); document.write( "\n" ); document.write( "Read them and become an expert in solution the mixture word problems.\r
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\n" ); document.write( "\n" ); document.write( "Closest to your problems are the problems 1 and 2 of the very first lesson of the list, marked (*).\r
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\n" ); document.write( "\n" ); document.write( "Also, you have this free of charge online textbook in ALGEBRA-I in this site\r
\n" ); document.write( "\n" ); document.write( "    - ALGEBRA-I - YOUR ONLINE TEXTBOOK.\r
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\n" ); document.write( "\n" ); document.write( "The referred lessons are the part of this online textbook under the topic \"Mixture problems\".\r
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\n" ); document.write( "\n" ); document.write( "Save the link to this online textbook together with its description\r
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\n" ); document.write( "\n" ); document.write( "Free of charge online textbook in ALGEBRA-I
\n" ); document.write( "https://www.algebra.com/algebra/homework/quadratic/lessons/ALGEBRA-I-YOUR-ONLINE-TEXTBOOK.lesson\r
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\n" ); document.write( "\n" ); document.write( "to your archive and use it when it is needed.\r
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