document.write( "Question 153543: How many kilograms of water must be evaporated from 50 kg of a 10% salt solution to obtain a 15% salt solution? \n" ); document.write( "

Algebra.Com's Answer #113029 by stanbon(75887) $\"\"$ $\"About$

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How many kilograms of water must be evaporated from 50 kg of a 10% salt solution to obtain a 15% salt solution?
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\n" ); document.write( "EQUATION:
\n" ); document.write( "salt: 0.10*50 -0*x = 0.15(50-x)\r
\n" ); document.write( "\n" ); document.write( "Multiply thru by 100 to get rid of the decimals:\r
\n" ); document.write( "\n" ); document.write( "10*50 = 15(50-x)
\n" ); document.write( "500 = 750 - x
\n" ); document.write( "x = 250 kg (amount of water that must be evaporated)
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\n" ); document.write( "Notice that this answer makes no sense; you cannot evaporate
\n" ); document.write( "250 kg when you only have 50 kg.
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\n" ); document.write( "Why the nonsense?
\n" ); document.write( "Notice that you started with a 10% solution, evaporated water,
\n" ); document.write( "and ended up with a 15% solution. That cannot happen.
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.\r
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