A chemistry teacher needs to mix a 20% salt solution with a 80% salt solution to make 15 qt of a 40% salt solution. how many quarts of each solution should the teacher mix to get the desired result?

Guest Jan 17, 2020

#1**+2 **

The amount of salt in the finished product equals the amount of salt from the ingredients

Finished product salt = 40% x 15 qt = .4 x 15 = 6

20% solution volume x amount of salt = .2x

80% solution volume = 15-x amount of salt = .8 (15-x) added together = 6

.2x + .8(15-x) = 6

-.6x +12 =6

-.6x = -6

x = 10 qt amount of 20% solution

15-x = 5 qt = amount of 80% solution

ElectricPavlov Jan 17, 2020