Doreen Schmidt is a chemist.

Question

Concentration rate
Ounces of Solution
Ounces of Pure Acid
First Solution
6%
x
0.06x
Second Solution
12%
y
0.12y
Mixture Needed
8%
24

0.08(24)

She needs to prepare 24 ounces of a 8% hydrochloric acid solution. Find the amount of 12% solution and the amount of 6% solution she should mix to get this solution.

 

Answer 1

Overall solution balance:   x + y = 24   Equation A

Acid Balance:     0.06x + 0.12y = 0.08(24)  Equation B

Multiply Equation A by -6

Multiply Equation B by 100

to get rid of the x term.

Solve for y and plug back into original Equation A above to get x.

x represents amount of 6% acid in oz

y represents amount of 12% acid in oz

Can you handle it from there Corina?