Calculate how much 10% acid solution and how much pure acid must be mixed to end up with exactly 12 liters of 30% acid solution.

Guest Aug 5, 2020

#1**+1 **

12 liters final

x = 10%

12-x = 100% solution

.1 x + 1 (12-x) == .3 (12)

.1x + 12 - x = 3.6

.9x =8.4

x = 9 1/3 liters of 10%

ElectricPavlov Aug 5, 2020

#2**+1 **

So we have 12 liters in the end.

First, we can set acid percentage to 10%

a=.1

And we also have 12-a as the full solution at 100%

Soo..

.1a+12-x=.3(12)

solve the rest

:D

Inspirational Aug 6, 2020