# How can I calculate percent concentration by volume?

##### 1 Answer

Dec 28, 2014

Percent concentration by volume is defined as the volume of the solute divided by the total volume of the solution and multiplied by 100%. This is expressed mathematically as:

Let's take an example to show how this is done. What is the percent concentration by volume of a solution composed of **150.0 mL** of rubbing alcohol and **400.0 mL** of water.

So,

It is of the *utmost importance* to know that the volume of the solution is not just the volume of the solvent, but

Therefore,