document.write( "Question 1194698: How many quarts of pure alcohol should be added to 10 quarts of 10% alcohol solution to obtain a mixture of 25% alcohol? \r
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Algebra.Com's Answer #826938 by ikleyn(52787) $\"\"$ $\"About$

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document.write( "Initially, we have 10 quarts of 10% acohol solution.\r\n" );
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document.write( "It contains, obviously, 1 quarts of pure alcohol and 10-1 = 9 quarts of water.\r\n" );
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document.write( "When we add pure alcohol, the water contents of 9 quarts remains uncheanged.\r\n" );
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document.write( "So, in the new mixture, 9 quarts of water should comprise 75% of liquid.\r\n" );
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document.write( "Hence, the total volume of the mixture should be   =  = 3*4 = 12 quarts.\r\n" );
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document.write( "It means that 12-10 = 2 quarts of the pure alcohol should be added.    ANSWER\r\n" );
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\n" ); document.write( "\n" ); document.write( "Solved.\r
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\n" ); document.write( "\n" ); document.write( "It can be solved in other way/(ways), too, but I presented here the MENTAL solution.\r
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\n" ); document.write( "\n" ); document.write( "On solving mixture problems, see the lessons\r
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\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
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\n" ); document.write( "\n" ); document.write( "    - Special type mixture problems on DILUTION adding water\r
\n" ); document.write( "\n" ); document.write( "    - Increasing concentration of an acid solution by adding pure acid \r
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\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 the mixture word problems.\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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