document.write( "Question 273772: How many liters of water must be evaporated from 10 L of a 40% salt solution to produce a 50% solution? \n" ); document.write( "
Algebra.Com's Answer #727010 by greenestamps(13200)\"\" \"About 
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\n" ); document.write( "Ignoring the scientific fact that these percentages of salt solution are not possible, and treating this purely as a mathematical exercise, note that the amount of salt in 10 L of 40% salt is 4L.

\n" ); document.write( "You want that same amount of salt to be 50% of the final mixture; that means the final mixture must be 8 L.

\n" ); document.write( "Since you started with 10L and ended with 8L, the amount of water evaporated was 2L.
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