Question 32243
Let amount of 11% solution be "x"
Then amount of 19% solution is "25-x" liters
Acid in 11% solution is 0.11x liters
Acid in 19% solution is 0.19(25-x)= 4.75-0.1925x liters
EQUATION:
acid + acid = 0.17(25) liters
0.11x+4.75-0.19x=4.25 liters
Multiply through by 100 to get:
11x+475-19x=425
-8x=-50
x=6.25 liters (amount of 11% solution)
25-x=18.75 liters (amount of 19% solution)
Cheers,
Stan H.