Problema Solution
Pure acid is to be added to a 5% acid solution to obtain 95 liters of 85% solution. What amounts of each should be used?
Answer provided by our tutors
Let x litres of pure acid is added so, 95-x liters of 5% acid solution.
Therefore,
x*1+(95-x)(0.05)=(95)(0.85)
x+4.75-.05x=80.75
.95x=80.75-4.75
0.95x=76
x=76/(0.95)=80
Amount of pure acid added=80 liters and and amount of 5% acid added=95-80=15 liters.