Problema Solution
How many liters of water should be added to a 2-liter of 20% alcohol to obtain a 7.5% alcohol solution?
Answer provided by our tutors
let
x = liters of water (0% alcohol solution)
0.20*2 + 0*x = 0.075(2 + x)
by solving we find:
x = 3.33 L
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3.33 liters of water should be added.