SOLUTION: two acid solution are available to a chemist. one is a 10% nitric acid solution and the other is a 40% nitric acid solution.how much of each type of solution should be mixed togeth

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Question 343870: two acid solution are available to a chemist. one is a 10% nitric acid solution and the other is a 40% nitric acid solution.how much of each type of solution should be mixed together to for a 12 litters of a 20% nitric solution
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Let A be the amount of 10% nitric acid solution and let B be the amount of 40% nitric acid solution.
Total volume equation:
1.A%2BB=12
.
.
.
Concentration equation:
10A%2B40B=20%2812%29
10A%2B40B=240
2.A%2B4B=24
Subtract eq. 1 from eq. 2,
A%2B4B-A-B=24-12
3B=12
highlight%28B=4%29liters
Then from eq. 1,
A%2B4=12
highlight%28A=8%29liters