Question

in a solution of common salt in water the ratio of salt to water was 30 :70 as per weight if we evaporate 100 gram water from one kilogram of this solution what will be the ratio of the salt to water by weight​

Answer 1

salt:water = 30:70

so in ikg solution salt=300g and water =700g.

now 100g water is evaporated so net water =600g so the ratio would be 300:600=1:2.

now for 100g the ratio would be (100/3):(200/3) i.e. approximately 33.33:66.67