document.write( "Question 966256: how much pure acid do you have to add to 250 mL of an 8% acid solution to get a 20% acid solution \n" ); document.write( "

Algebra.Com's Answer #590569 by lwsshak3(11628) $\"\"$ $\"About$

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how much pure acid do you have to add to 250 mL of an 8% acid solution to get a 20% acid solution.
\n" ); document.write( "let x=amt of pure acid to add
\n" ); document.write( "8%(250)+100%x=20%(250+x)
\n" ); document.write( "20+x=50+.2x
\n" ); document.write( "0.8x=30
\n" ); document.write( "x=37.5
\n" ); document.write( "how much pure acid do you have to add? 37.5 mL \n" ); document.write( "

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