Problema Solution
How many milliliters of a 25% HCI solution must be added to a 50 milliliters of a 10% HCI solution to obtain a 20% HCI solution?
Answer provided by our tutors
let 'x' represent the milliliters of 25% solution, then the total volume of the solution is '50+x" and we have:
0.20(50+x) = 0.25x + 0.10(5)
solving for 'x' we have x=100
100 milliliters of the 25% solution should be added