document.write( "Question 479334: Mike is a chemist. He needs to prepare 36 ounces of 13% hydrochloric acid solution. Find the amount of 18% solution and amount of 9% solution he should mix to get this solution. \n" ); document.write( "
Algebra.Com's Answer #328483 by ankor@dixie-net.com(22740)\"\" \"About 
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He needs to prepare 36 ounces of 13% hydrochloric acid solution.
\n" ); document.write( " Find the amount of 18% solution and amount of 9% solution he should mix to get this solution.
\n" ); document.write( ":
\n" ); document.write( "Let x = amt of 18% solution required
\n" ); document.write( "the total is given as 36 oz, therefore:
\n" ); document.write( "(36-x) = 9% solution required
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\n" ); document.write( "A typical mixture equation
\n" ); document.write( ".18x + .09(36-x) = .13(36)
\n" ); document.write( ".18x + 3.24 - .09x = 4.68
\n" ); document.write( ".18x - .09x = 4.68 - 3.24
\n" ); document.write( ".09x = 1.44
\n" ); document.write( "x = \"1.44%2F.09\"
\n" ); document.write( "x = 16 oz of 18% acid required
\n" ); document.write( "then
\n" ); document.write( "36 - 16 = 20z of 9% acid
\n" ); document.write( ":
\n" ); document.write( ":
\n" ); document.write( "Check the solution in the original equation
\n" ); document.write( ".18(16) + .09(20) = .13(36) \n" ); document.write( "
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