A photographer is mixing 2 liters of a 10% acetic acid solution with a 5% solution to get a 7% solution. How many liters of the 5% solution should he add?

1 Answer
May 29, 2018

The volume of 5% acetic acid is =3L

Explanation:

Perform a material balance with respect to acetic acid.

Let the volume of 5% acetic acid be =vL

Then the total volume is =(2+v)L

The material balance is

2xx10/100+v*5/100=(2+v)*7/100

20+5v=14+7v

2v=20-14=6

v=3L

The volume of 5% acetic acid is =3L