document.write( "Question 842113: how many liters of water should be added to 20 liters of a 30% sulfuric acid solution to reduce it to a 15% solution ? \n" ); document.write( "
Algebra.Com's Answer #507362 by josgarithmetic(39617)\"\" \"About 
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Let D = density of 30% sulfuric acid\r
\n" ); document.write( "\n" ); document.write( "Water is 1.00 g/ml density
\n" ); document.write( "Let v = volume of water in milliliters to add\r
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\n" ); document.write( "\n" ); document.write( "This equation is expecting percents are in weight per wieght: \"%280.30%2820000%29D%29%2F%28v%2A1%2B20000%2AD%29=0.15\"
\n" ); document.write( "Assumption that volumes are simply additive was made.
\n" ); document.write( "Solve for v and then use:\r
\n" ); document.write( "\n" ); document.write( "Density of 30% sulphuric acid is 1.2212 g/ml
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