How many liters of water must be evaporated from 10 L of a 30% salt solution to produce a 50% solution?

Answer 1

Write an amount of salt equation, assuming the amount of salt is unchanged:

0.3(10) = 0.5(10-x)

3 = 5 -.0.5x

-2 = -0.5x

4 = x

4 Liters will need to be evaporated.