document.write( "Question 426354: In a container there are 12 ounces of a solution that is 80% acid. how many ounces of pure water must be added to produce a mixture that is 20% acid solution? \n" ); document.write( "
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In a container there are 12 ounces of a solution that is 80% acid. how many ounces of pure water must be added to produce a mixture that is 20% acid solution?\r
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\n" ); document.write( "\n" ); document.write( "let x=ounces of pure water to be added.
\n" ); document.write( "note that the amount of acid does not change. We are just adding more water to get a weaker concentration of acid.
\n" ); document.write( ".80(12)=.2(12+x)
\n" ); document.write( "9.6=2.4+.2x
\n" ); document.write( ".2x=9.6-2.4=7.2
\n" ); document.write( "x=7.2/.2=36
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\n" ); document.write( "36 ounces of pure water must be added to produce a mixture that is 20% acid solution?\r
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