document.write( "Question 351038: 5. A chemist has one solution that is 15% acid and another solution that is 25% acid. How much of the 15% solution is needed to make 100 L of a solution that is 18% acid?\r
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document.write( "a. 45 L b. 70 L c. 25 L d. 30 L \n" );
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Algebra.Com's Answer #250907 by stanbon(75887) ![]() You can put this solution on YOUR website! A chemist has one solution that is 15% acid and another solution that is 25% acid. How much of the 15% solution is needed to make 100 L of a solution that is 18% acid? \n" ); document.write( "------------------------ \n" ); document.write( "Equation: \n" ); document.write( "acid + acid = acid \n" ); document.write( "0.15x + 0.25(100-x) = 0.18*100 L \n" ); document.write( "--------------------------------------------- \n" ); document.write( "Multiply thru by 100 to get: \n" ); document.write( "15x + 2500-25x = 1800 \n" ); document.write( "--- \n" ); document.write( "-10x = -700 \n" ); document.write( "x = 70 L (amt of 15% solution needed for the mixture) \n" ); document.write( "--- \n" ); document.write( "100-x = 30L (amt of 25% solution needed for the mixture) \n" ); document.write( "==================================== \n" ); document.write( "Cheers, \n" ); document.write( "Stan H.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( "a. 45 L b. 70 L c. 25 L d. 30 L \n" ); document.write( " \n" ); document.write( " |