In a chemistry class, 12 L of a 12% alcohol solution must be mixed with a 20% solution to get a 14% solution. How many liters of

Question

Irina-Kira [14]

3 years ago

15

In a chemistry class, 12 L of a 12% alcohol solution must be mixed with a 20% solution to get a 14% solution. How many liters of

the 20% solution are needed?

Mathematics

1 answer:

tigry1 [53] · Answer 1 · 2022-07-26T08:36:41+03:00

tigry1 [53]3 years ago

3 0

Let x = liters 20% solution to be added
then

.12(12) + .20x = .14(12+x)
.12(12) + .20x = .14(12+x)
1.44 + .20x = 1.68 + .14x
.20x = .24 + .14x
.06x = .24
x = 4 liters

Hope this helped!!