How much water must be evaporated from 24 ounces of a 4% salt solution to make a 6% salt solution? To obtain a solution that is 6% salt, ounce(s) of water must be evaporated.

Question

How much water must be evaporated from 24 ounces of a 4% salt solution to make a 6% salt solution? To obtain a solution that is 6% salt, ounce(s) of water must be evaporated.

Answer 1

.96/24 = .04

4%= .04

.04 times 24 ounces = .96 ounce

you have now 0.96 ounce of salt

you want that number divided by x to = .06

.96/x = .06

.06x = .96

x = .96/.06 = 16 ounces

vaporize 24-16 = 8 ounces of water to get 6% salt

when the weight of what's left is down to 16 ounces, then you've burned off 8 counces and reached 6% salt