Question

How much water must be evaporated from 36 ounces of a 8% salt solution to make a 9% salt solution?

To obtain a solution that is 9% salt, how many ounces of water must be evaporated
(Simplify your answer.)

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Answer 1

Explanation:

Answer 2

4 oz of water must be evaporated

Explanation:

If we let x represent the amount of water to be evaporated, the relation between the solutions is ...

0.08 · 36 oz = 0.09 · (36 -x) oz

0.09x = 36(0.09 -0.08) . . . . . divide by oz; add .09x, subtract .08·36

x = 36· 0.01/0.09 = 36/9 = 4

4 ounces of water must be evaporated.