Problema Solution
Professor Stevens wants to mix a solution containing 13% acid with a mixture containing 18% acid to obtain a 50 milliliter solution containing 16% acid. How many milliliters of the 13% solution should the professor use?
Answer provided by our tutors
Let
x = ml of 13% solution
y = ml of 18% solution
x + y = 50
0.13x + 0.18y = 0.16*50
........
click here to see the system of equations solved for x and y
........
x = 20 ml
y = 30 ml
Professor Stevens should use 20 milliliters of the 13% solution.