how much water must be evaporated from 36 ounces of a 4% salt solution to make a 5% salt solution? (this would result in a decrease in the quantity of the solution.)
show work please..if you can
2007-09-02 13:26:02 · 4 answers · asked by aajain03 1 in Science & Mathematics ➔ Mathematics
Let x ounces of water is required to be evaporated for converting 36 ounces of 4% salt solution to a 5% one
By the problem,
0.04*36=0.05(36-x)
or,1.44=1.8-0.05x
or,0.05x=1.8-1.44=0.36
x=0.36/0.05=7.2
Therefore 7.2 ounces of water is to evaporated
2007-09-02 13:46:33 · answer #1 · answered by alpha 7 · 0⤊ 0⤋
0.04(36) - x = 0.05(36 - x)
1.44 - x = 1.8 - 0.05x
0.95x = 0.36
x = 36/95
Answer: 36/95 OR 0.37895 ounces
2007-09-06 11:53:42 · answer #2 · answered by Jun Agruda 7 · 3⤊ 0⤋
(36-x)/36 = .95
36-x = .95*36= 34.2
x = 36-34.2 = 1.8 ounces
2007-09-02 20:41:37 · answer #3 · answered by ironduke8159 7 · 0⤊ 0⤋
36 x 0.04 = 0.05 x ??
36 x 0.04 / 0.05 = ??
36 - ?? = your answer
2007-09-02 20:34:56 · answer #4 · answered by Boots McGraw 5 · 0⤊ 0⤋