# How can you tell that catalase has been added to hydrogen peroxide?

It will bubble!

#### Explanation:

The catalase enzyme causes the hydrogen peroxide to break down. This reaction forms water and oxygen. The bubbles are oxygen gas.

$2 {H}_{2} {O}_{2} \left(l\right) \to 2 {H}_{2} O \left(l\right) + {O}_{2} \left(g\right)$

Check out video of this reaction below. The liver in the test tube is a source of catalase enzyme

The wooden splint starts burning again because the the bubbles are filled with oxygen gas.

Hope this helps!