document.write( "Question 456086: How many liters of water must be evaporated from 20L of a 30% salt solution to produce a 50% salt solution? \n" ); document.write( "
Algebra.Com's Answer #313093 by Alan3354(69443)\"\" \"About 
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How many liters of water must be evaporated from 20L of a 30% salt solution to produce a 50% salt solution?
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\n" ); document.write( "20L of a 30% salt solution has 6 liters of salt in 14 liters of water
\n" ); document.write( "To be 50%, the water has to also be 6 liters
\n" ); document.write( "14 - 6 = 8 liters of water to evaporate.
\n" ); document.write( "8 liters
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\n" ); document.write( "PS The salt doesn't evaporate, only the water. In a salt water fish tank, you never have to add salt.
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