Question

How much water must be evaporated from 36 ounces of 1% salt solution to make 9% salt​ solution?

To obtain a solution that is ​salt,
nothing ​ounce(s) of water must be evaporated.

simplify

Answer 1

8 ounces to be evaporated

Explanation:

There are 2.52 oz of salt (36 * 0.07)

For 2.52 oz to be 9%, the total is 2.52 / 0.09 = 28 oz total

36 - 28 = 8 ounces