document.write( "Question 737199: please help me with this problem of writing a rational and/or polynomial equation. If Laura mixes 5mL acetic acid with 120mL water to make a solution that should be 5% acid, how does she know she needs to add more acetic acid? \n" ); document.write( "
Algebra.Com's Answer #450214 by jim_thompson5910(35256) ![]() You can put this solution on YOUR website! She has 5+120 = 125 mL of solution total when she mixes the acid and water.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "5/125 = 1/25 = 0.04 = 4% of this solution is pure acid\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "BUT she wants 5% of the solution to be pure acid. So she needs more acetic acid to go from 4% acid to 5% acid. \n" ); document.write( " |