<PRE><B>Question 178514</B>
There are 720 grams of salt in the pot. If the concentration is to be 200 grams per liter, then there must be 3.6 liters of brine, so 2.4 liters of water must be boiled off.

:

6L of 120g/L = xL of 200 g/L
6(120) = 200x
720 = 200x
3.6 = x

So you end up with 3.6 liters...so you have to boil off 2.4 liters</PRE>