Question 867278: How many ounces of 10% hydrochloric acid, 35% hydrochloric acid, and water must be combined to get 10 ounces of solution that is 7.5% hydrochloric acid, if the amount of water used must equal the total amount of the other two solutions?
Answer by richwmiller(17219)   (Show Source):
You can put this solution on YOUR website! from view of water
a+b+c=10,
c=a+b,
.90a+.65b+c=10*.925
a=4, b=1, c=5
from view of acid
.10a+.35b=10*(.075),
a+b+c=10
a+b=c
a=4, b=1, c=5
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