Problema Solution
a chemist has 15ml of a solution that contains a 40% concentration of acid. how many milliliters of pure acid must be added in order to increase the concentration to 60%?
Answer provided by our tutors
Let 'x 'represent the amount of pure acid added we have
40% of 15 + 100% of x = 60% total ml of both
0.40*15 + 1* x = 0.60*(15+x)
Simplify and Solve
x = 7.5
We need to add 7.5 ml pure acid.