document.write( "Question 206285: A chemist has two solutions of H2SO4 one has 40% concentrate and the other has a 25% concentrate. Eash solution mustbe mixed to obtain 60 liters of a 30% solution? \n" ); document.write( "

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A chemist has two solutions of H2SO4 one has 40% concentrate and the other has a 25% concentrate.
\n" ); document.write( " Each solution must be mixed to obtain 60 liters of a 30% solution?
\n" ); document.write( ":
\n" ); document.write( "Let x = amt of 40% solution
\n" ); document.write( "then
\n" ); document.write( "(60-x) = amt of 25% solution
\n" ); document.write( ":
\n" ); document.write( "A simple mixture equation:
\n" ); document.write( ".40x + .25(60-x) = .30(60)
\n" ); document.write( ":
\n" ); document.write( ".40x + 15 - .25x = 18
\n" ); document.write( ":
\n" ); document.write( ".40x - .25x = 18 - 15
\n" ); document.write( ":
\n" ); document.write( ".15x = 3
\n" ); document.write( "x = $\"3%2F.15\"$
\n" ); document.write( "x = 20 liters of 40% solution
\n" ); document.write( "and
\n" ); document.write( "60 - 20 = 40 liters of 25% solution
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\n" ); document.write( ":
\n" ); document.write( "Check:
\n" ); document.write( ".4(20) + .25(40) = .3(60)
\n" ); document.write( "8 + 10 = 18
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