document.write( "Question 1118281: Theresa Morgan, a chemist, has a 25% hydrochloric acid solution and a 50% hydrochloric acid solution. How many liters of each should she mix to get 387.5 liters of a hydrochloric acid solution with a 40% acid concentration? \r
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document.write( " liters of 25% hydrochloric acid solution .\r
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document.write( " liters of 50% hydrochloric acid solution . \n" );
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Algebra.Com's Answer #733565 by addingup(3677)![]() ![]() You can put this solution on YOUR website! 0.25x + 0.50(387.5 - x) = 0.40(387.5) \n" ); document.write( "0.25x + 193.75 - 0.50x = 155 \n" ); document.write( "-0.25x = -38.75 \n" ); document.write( "x = 155 liters. She needs this number of liters at 25% and 387.5 - 155 = 232.5 liters at 50% \n" ); document.write( "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ \n" ); document.write( "Check: \n" ); document.write( "232.5(0.5) + 155(0.25) = 155 Correct\r \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |