Question

Ten litres or a solution of salt in water contains 25% salt. How much water must be evaporated
from the solution so as to increase the salt content to 40%?
a) 7.5 litres
b) 3.75 litres
c) 2.5 litres
d) 1.75 litres​

Answer 1

Answer:

2.5L

Step-by-step explanation:

solutions of water =10L.25%salt mixed so, 75%is water . 75/100*10L=7.5L water . (so, when 40%salt then ,water is 60%) . and 10L-7.5L=2.5L water