SOLUTION: Blair needs a 25% acid solution for an experiment in class, but unfortunately, he only has a 15% solution in the stockroom. How much pure acid must he add to 80 litres of a 15% aci

Question 799144: Blair needs a 25% acid solution for an experiment in class, but unfortunately, he only has a 15% solution in the stockroom. How much pure acid must he add to 80 litres of a 15% acid solution to bring it up to a concentration of 25%?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Let = liters of pure acid needed
liters of acid in 15% solution
---------------

10.667 liters od pure acid must be added
check:

OK
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