SOLUTION: In the school's chemistry lab, a certain acid is stored in two different dilutons. One bottle contains a weaker solution that is only 25% acid, but another has a stronger solution

Question 523181: In the school's chemistry lab, a certain acid is stored in two different dilutons. One bottle contains a weaker solution that is only 25% acid, but another has a stronger solution of 65% acid. students must pour some from each container to make 60ml of a solution that is 50% acid. HOw much from each container should be used?
I know i'm going to use the two variables s-stronger and w-weaker. just can't figure out what the two equations going to be.
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
In the school's chemistry lab, a certain acid is stored in two different dilutons. One bottle contains a weaker solution that is only 25% acid, but another has a stronger solution of 65% acid. students must pour some from each container to make 60ml of a solution that is 50% acid. HOw much from each container should be used?
-----
Equations:
Quantity: s + w = 60 ml
Acid::::0.65s+0.25w = 0.50*60
--------------------------------------
Multiply thru the Quantity equation by 65
Multiply thru the Acid equation by 100
--------------------------------------------
65s + 65w = 65*60
65s + 25w = 50*60
---------------------
subtract and solve for "w":
40w = 15*60
w = (3/2)15
w = 22.5 ml (amt. of weaker solution needed)
------
Solve for "s":
s + w = 60
s = 60-22.5 = 37.5 ml
------------------------------
Cheers,
Stan H.
===========================

RELATED QUESTIONS
In the chemistry lab, a certain acid is stored in two different dilutions. One bottle... (answered by stanbon)

The chemistry lab keeps two acid solutions. One is 20% acid solutin and the other 35%... (answered by Fombitz)

A student in a chemistry lab has access to two acid solutions. The first solution is 10%... (answered by Alan3354)

If a 16 oz. bottle contains a 3%acid solution how much acid is in the bottle? How do I... (answered by josmiceli)

In your chemistry lab you have a bottle of 1% acid and a bottle of 5% of acid. You need... (answered by mananth)

The chemistry lab contains several solutions. Solution A is 80% acid while solution B is (answered by Paul)

Karen is working in the chemistry lab and needs a solution that is 8% hydrochloric acid.... (answered by nerdybill)

In your chemistry lab, you have a bottle of 2% hydrochloric acid solution and a bottle of (answered by stanbon)

The chemistry lab at the University of Hardwoods keeps two acidic solutions on hand. One... (answered by stanbon)