document.write( "Question 990028: determine the number of milliliters of a 70% sulfuric acid solution that must be added to 160 milliliters of a 25% solution to make a 30% solution \n" ); document.write( "
Algebra.Com's Answer #610138 by stanbon(75887)\"\" \"About 
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determine the number of milliliters of a 70% sulfuric acid solution that must be added to 160 milliliters of a 25% solution to make a 30% solution
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\n" ); document.write( "Equation:
\n" ); document.write( "acid + acid = acid
\n" ); document.write( "0.25*160 + 0.70x = 0.30(160+x)
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\n" ); document.write( "25*160 + 70x = 30*160 + 30x
\n" ); document.write( "40x = 5*160
\n" ); document.write( "x = 20 ml (amt. of 70% solution to add)
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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