How much water must be evaporated from 36 ounces of 1% salt solution to make 9% salt solution?
Water = 0% salt...so
36 (.01) - x (0) = (36 - x) (.09) simplify
.36 = 3.24 - ,09x
.,09x = 3.24 - .36
.09x = 2.88
x = 288 / .09 = 32 ounces of water must be evaporated
original salt = final salt
.01(36) = .09 (x)
x = .01(36)/(.09) = 4 oz final so 36-2 = 32 ounces must be evaporated
