document.write( "Question 636323: I have on hand 98% alcohol. How much sterile water do I need to add to arrive at a solution of 20%. \n" ); document.write( "
Algebra.Com's Answer #400922 by ptaylor(2198)![]() ![]() You can put this solution on YOUR website! Please re-check your problem. \n" ); document.write( "Seems like we need to know the amount of 98% alcohol that you have on hand.\r \n" ); document.write( "\n" ); document.write( "Hope this helps---ptaylor \n" ); document.write( "The 98% alcohol is in a 5 ml vial, soooo \n" ); document.write( "Let x=amount of sterile water needed \n" ); document.write( "Now we know that the amount of pure alcohol before the mixture takes place(0.98)*5 has to equal the amount of pure alcohol after the mixture takes place 0.20(5+x).\r \n" ); document.write( "\n" ); document.write( "Sooo our equation to solve is: \n" ); document.write( "0.98*5=0.20(5+x) simplify \n" ); document.write( "4.9=1+0.20x subtract 1 from each side \n" ); document.write( "3.9=0.20x \n" ); document.write( "x=19.5 ml---amount of sterile water needed \n" ); document.write( "CK \n" ); document.write( "0.98*5=0.20(5+19.5) \n" ); document.write( "4.9=1+3.9 \n" ); document.write( "4.9=4.9\r \n" ); document.write( "\n" ); document.write( "Hope this helps---ptaylor \n" ); document.write( " |