document.write( "Question 454633: 10 Liters of a 20% acid solution are mixed with 30 Liters of a 30% acid solution. What is the concentration of acid in the final mixture?
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\n" ); document.write( "\n" ); document.write( "Concentration = (the number of Liters of pure acid) / (total number of Liters in the mixture)
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Algebra.Com's Answer #312146 by stanbon(75887)\"\" \"About 
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10 Liters of a 20% acid solution are mixed with 30 Liters of a 30% acid solution. What is the concentration of acid in the final mixture?
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\n" ); document.write( "Equation:
\n" ); document.write( "acid + acid = acid
\n" ); document.write( "0.20*10 + 0.30*30 = x(40)
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\n" ); document.write( "Multiply thru by 100 to get:
\n" ); document.write( "20*10 + 30*30 = 4000x
\n" ); document.write( "200 + 900 = 4000x
\n" ); document.write( "x = 1100/4000
\n" ); document.write( "x = 0.275 or 27.5%
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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