document.write( "Question 1092040: 40 liters of a 50% salt solution are reduced to a 40% salt solution. How much of salt solution must be drained off and replaced with distilled water so that the resulting solution contains only 40% solution? \n" ); document.write( "
Algebra.Com's Answer #706545 by ikleyn(52786)\"\" \"About 
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\n" ); document.write( "Couple of notices regarding this problem.\r
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document.write( "1.  The info from Wikipedia, https://en.wikipedia.org/wiki/Saline_water\r\n" );
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document.write( "    The saturation level is dependent on the temperature of the water. At 20 °C one milliliter of water can dissolve \r\n" );
document.write( "    about 0.357 grams of salt; a concentration of 26.3%. At boiling (100 °C) the amount that can be dissolved \r\n" );
document.write( "    in one milliliter of water increases to about 0.391 grams or 28.1% saline solution.\r\n" );
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document.write( "    So, it is practically unrealistic thing to have more than 28% solution of NaCl in water.\r\n" );
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document.write( "    I fully understand that this physical info is out of your scope now,\r\n" );
document.write( "    but it is still useful to know.\r\n" );
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\n" ); document.write( "\n" ); document.write( "2. There is entire bunch of introductory 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 alloys \r
\n" ); document.write( "\n" ); document.write( "    - Typical word problems on mixtures from the archive\r
\n" ); document.write( "\n" ); document.write( "in this site.\r
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\n" ); document.write( "\n" ); document.write( "Read them and become an expert in solution mixture word problems.
\n" ); document.write( "In particular, you will find the problems of the type \"draining-replacing\" in the lesson marked by (*).\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 textbook in the section \"Word problems\" 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\r
\n" ); document.write( "\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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