document.write( "Question 713055: How much water has to be evaporated from a container with some amount of 1% acid solution in order to end up with 10 liters of a 2% solution? \n" ); document.write( "

Algebra.Com's Answer #438269 by josgarithmetic(39618) $\"\"$ $\"About$

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About half of the water. Are you trying to ask what was the volume of the 1% acid solution to begin with? We can work backward from what the solution became. You doubled the concentration so evaporated half the water.\r
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\n" ); document.write( "\n" ); document.write( "Result is 2% acid, size is 10 liters. Let w be the liters to add back to get 1% acid.\r
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\n" ); document.write( "\n" ); document.write( " $\"highlight%28%2810%2A2%2B0%2Aw%29%2F%2810%2Bw%29=1%29\"$
\n" ); document.write( " $\"%2810%2A2%29%2F%2810%2Bw%29=1\"$
\n" ); document.write( " $\"10%2A2=1%2810%2Bw%29\"$
\n" ); document.write( " $\"20=10%2Bw\"$
\n" ); document.write( "20-10=w
\n" ); document.write( " $\"highlight%28w=10%29\"$ liters would be added to return to the 1% acid concentration.
\n" ); document.write( " So \"some\" 1% acid solution was 10 liters + 10 liters = 20 liters. \n" ); document.write( "

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