Problema Solution
you wish to create a 3.5% solution of Hydrochloric acid (HCI). you have an abundance of 3% HCI and exactly 12 centiliters of 5% HCI. How much 3% HCI do you need with the 12 Centiliters of 5% HCI to create the 3.5% solution? How much 3.5% HCI will you have?
Answer provided by our tutors
let 3% used = x centiliters
=> (3x + 5*12)/(12+x) = 3.5
=> 3x + 60 = 42 + 3.5x
=> x = 36 centiliters
amount of 3.5% = 48 centiliters