document.write( "Question 641515: a chemist has 20 liters of a 10% acid solution.How many liters of pure acid must be added to produce a 25% acid solution? \n" ); document.write( "
Algebra.Com's Answer #403754 by lwsshak3(11628)\"\" \"About 
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a chemist has 20 liters of a 10% acid solution.How many liters of pure acid must be added to produce a 25% acid solution?
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\n" ); document.write( "let x=amt of pure acid must be added to produce a 25% acid solution
\n" ); document.write( "x+20=amt of 25% acid solution
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\n" ); document.write( "10%*20+100%x=25%(x+20)
\n" ); document.write( "2+x=.25x+5
\n" ); document.write( ".75x=3
\n" ); document.write( "x=3/.75=4
\n" ); document.write( "amt of pure acid must be added to produce a 25% acid solution=4 liters
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