You have 2.4 liters of 25% hydrochloric acid solution. You are asked by the pharmacist to make as much 15% hydrochloric acid solution as possible. How much water do you use?
A)1400ml
B)1600ml
C)1800ml
D)2000ml

Question

Quizplus · Accepted Answer

You would add 1600ml (1.6 liters) of water. Here is how that was found:
25% of 2400ml = 600ml of active ingredient
(600 x 100) = 4000 total milliliters of solution
15
4000 - 2400 = 1600ml of additional water

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