document.write( "Question 1046199: What amount of a 15% hcl acid solution must be mixed with a 20% hcl acid solution to obtain 50 milliliters of 18% solution? \n" ); document.write( "

Algebra.Com's Answer #661682 by jorel555(1290) $\"\"$ $\"About$

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Let n be the amount of 20% solution. Then:
\n" ); document.write( ".2n+.15(50-n)=.18(50)
\n" ); document.write( ".05n+7.5=9
\n" ); document.write( ".05n=1.5
\n" ); document.write( "n=30
\n" ); document.write( "You need 30ml of 20% solution, and 20ml of 15% solution to make 50ml of 18% solution. ☺☺☺☺ \n" ); document.write( "

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