Posted by Anisha on .
chemist has 6liter of 50% acid solution .how much water added to obtain 20% acid solution?

math 
bobpursley,
You want to dilute it from .5 to .2 or 5/2=2.5 times. So you add one part original stuff, then 1.5 parts water.
So add 9 liters water to get .2 percent acid.