Question

how much water must be evaporated from 150 liters of 4% salt solution to obtain a solution that is 6% salt?

Answer 1

help!

Answer 2

Is this a chemistry question? I might be over thinking this if it isnt.

Answer 3

First, if you have 150 liters of 4% salt, how much of it is salt ?

Answer 4

6 liters?

Answer 5

okay, 6 units of salt. if you want a 6% salt solution with 6 units of salt, how many liters of solution will you have?

Answer 6

in other words, if 6 = 6% of x, what is x?

Answer 7

compare that value of x with 150 to find the amount of water that must be evaporated...

Answer 8

6/150?

Answer 9

is it 4% ?

Answer 10

By definition,

Volume percent = [ weight of solute (in g) /volume of solution (in mL) ] x 100

solute = salt

Wt of salt (g) in 150 L = 4 % x 150,000 ml = 600,000 g

Volume of water (ml) in 6% salt solution = 600,000 g / 6 = 100,000 ml

Volume to evaporated

150,000 ml - 100,00 ml = 50,000 ml or 50 L
Thus 50 litres of water must be evaporated from 150 liters of 4% salt solution to obtain a solution that is 6% salt.
Thats it.

Answer 11

thanks!