Problema Solution
A student needs to strengthen a mixture that is 12% alcohol to one that is 35% alcohol. How much pure alcohol should be added to 15 liters of the 12% mixture?
Answer provided by our tutors
Let
x = liters of pure 100% alcohol to be added
0.12*15 + 1.00*x = 0.35*(15 + x)
........
click here to see the equation solved for x
........
x = 5.31 L
Approximately 5.31 liters of pure alcohol should be added to the mixture.