# How many liters of water must be added to 8 liters of a 40% acid solution to obtain a 10% acid solution?

##### 1 Answer

Aug 24, 2015

#### Answer:

You would add 24 L of water.

#### Explanation:

We will assume that the density of the solution remains constant (even though the density changes with concentration!).

A 40 % concentration means

So the volume of acid in 8 L of solution is

So you have

You want to add

Then

You would have to add 24 L of water.

**Check:**

It checks!