Question

A chemit ha one olution, 50% acid, and a econd, 25% acid. How much of each hould be mixed to make 10litre of a 40% acid olution?

Answer 1

6 liters of the 50% acid, 4 liters of the 25% acid

Explanation:

`.5x + .25(10 - x) = .4(10)`

`.5x + 2.5 - .25x = 4`

`2.5 + .25x = 4`

`.25x = 1.5`

`x = 6`

6 liters of the 50% acid

4 liters of the 25% acid